A

Mutations in the Key Autophagy Tethering Factor EPG5 Link Neurodevelopmental and Neurodegenerative Disorders Including Early‐Onset Parkinsonism

Annals of Neurology, vol. 98, pp. 932–950

Abstract

OBJECTIVE: Autophagy is a fundamental biological pathway with vital roles in intracellular homeostasis. During autophagy, defective cargoes including mitochondria are targeted to lysosomes for clearance and recycling. Recessive truncating variants in the autophagy gene EPG5 have been associated with Vici syndrome, a severe early-onset neurodevelopmental disorder with extensive multisystem involvement. Here, we aimed to delineate the extended, age-dependent EPG5-related disease spectrum. METHODS: We investigated clinical, radiological, and molecular features from the largest cohort of EPG5-related patients identified to date, complemented by experimental investigation of cellular and animal models of EPG5 defects. RESULTS: Through worldwide collaboration, we identified 211 patients, 97 of them previously unpublished, with recessive EPG5 variants. The phenotypic spectrum ranged from antenatally lethal presentations to milder isolated neurodevelopmental disorders. A novel Epg5 knock-in mouse model of a recurrent EPG5 missense variant featured motor impairments and defective autophagy in brain areas particularly relevant for the neurological disorders in milder presentations. Novel age-dependent neurodegenerative manifestations in our cohort included adolescent-onset parkinsonism and dystonia with cognitive decline, and myoclonus. Radiological features suggested an emerging continuum with brain iron accumulation disorders. Patient fibroblasts showed defects in PINK1-Parkin-dependent mitophagic clearance and α-synuclein overexpression, indicating a cellular basis for the observed neurodegenerative phenotypes. In Caenorhabditis elegans, EPG5 knockdown caused motor impairments, defective mitophagic clearance, and changes in mitochondrial respiration comparable to observations in C. elegans knockdown of parkinsonism-related genes. INTERPRETATION: Our findings illustrate a lifetime neurological disease continuum associated with pathogenic EPG5 variants, linking neurodevelopmental and neurodegenerative disorders through the common denominator of defective autophagy. ANN NEUROL 2025;98:932-950.

Authors 96

  1. University of Cologne · King's College London · Guy's and St Thomas' NHS Foundation Trust · Evelina London Children's Healthcare · University Hospital Cologne · Max Planck Institute for Biology of Ageing

    Affiliation as printed

    Department of Neurology, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Department of Pediatric Neurology Evelina London Children's Hospital, Guy's & St Thomas NHS Foundation Trust London UK

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging‐associated Diseases Cologne Germany

    Randall Center for Cell and Molecular Biophysics, Muscle Signaling Section, Faculty of Life Sciences and Medicine (FoLSM) King's College London London UK

    Department of Pediatric Neurology Evelina London Children's Hospital, Guy's & St Thomas NHS Foundation Trust London UK

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging-associated Diseases, Cologne, Germany

    Randall Center for Cell and Molecular Biophysics, Muscle Signaling Section, Faculty of Life Sciences and Medicine (FoLSM), King's College London, London, UK

  2. King's College London

    Affiliation as printed

    Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

    Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

  3. University College London

    Affiliation as printed

    UCL Consortium for Mitochondrial Research and Department of Cell and Developmental Biology University College London London UK

    UCL Consortium for Mitochondrial Research and Department of Cell and Developmental Biology, University College London, London, UK

  4. UCL Queen Square Institute of Neurology · University College London

    Affiliation as printed

    Department of Neuromuscular Diseases UCL Queen Square Institute of Neurology London UK

    Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK

  5. Affiliation as printed

    Vici Syndrome Foundation, Inc Silver Spring Maryland USA

    Vici Syndrome Foundation, Inc, Silver Spring, Maryland, USA

  6. King's College London

    Affiliation as printed

    Randall Center for Cell and Molecular Biophysics, Muscle Signaling Section, Faculty of Life Sciences and Medicine (FoLSM) King's College London London UK

    Randall Center for Cell and Molecular Biophysics, Muscle Signaling Section, Faculty of Life Sciences and Medicine (FoLSM), King's College London, London, UK

  7. King's College London

    Affiliation as printed

    Wolfson Sensory Pain and Regeneration Centre, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

    Wolfson Sensory Pain and Regeneration Centre, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

  8. King's College London

    Affiliation as printed

    Wolfson Sensory Pain and Regeneration Centre, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

    Wolfson Sensory Pain and Regeneration Centre, Institute of Psychiatry, Psychology & Neuroscience King's College London London UK

  9. University College London

    Affiliation as printed

    UCL Consortium for Mitochondrial Research and Department of Cell and Developmental Biology University College London London UK

    UCL Consortium for Mitochondrial Research and Department of Cell and Developmental Biology, University College London, London, UK

  10. University of Cologne · University Hospital Cologne · Max Planck Institute for Biology of Ageing

    Affiliation as printed

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging‐associated Diseases Cologne Germany

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging-associated Diseases, Cologne, Germany

  11. University of Cologne · University Hospital Cologne · Max Planck Institute for Biology of Ageing

    Affiliation as printed

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging‐associated Diseases Cologne Germany

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging-associated Diseases, Cologne, Germany

  12. Max Planck Institute for Biology of Ageing

    Affiliation as printed

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging‐associated Diseases Cologne Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging-associated Diseases, Cologne, Germany

  13. Shahid Chamran University of Ahvaz · UCL Queen Square Institute of Neurology · University College London

    Affiliation as printed

    Department of Biology, Faculty of Science Shahid Chamran University of Ahvaz Ahvaz Iran

    Department of Neuromuscular Diseases UCL Queen Square Institute of Neurology London UK

    Narges Medical Genetics and Prenatal Diagnosis Laboratory Ahvaz Iran

    Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

    Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK

    Narges Medical Genetics and Prenatal Diagnosis Laboratory, Ahvaz, Iran

  14. Boston Children's Hospital

    Affiliation as printed

    Department of Radiology Boston Children's Hospital Boston MA USA

    Department of Radiology, Boston Children's Hospital, Boston, MA, USA

  15. Guy's Hospital · St Thomas' Hospital · Guy's and St Thomas' NHS Foundation Trust

    Affiliation as printed

    Department of Radiology Guy's and Saint Thomas' Hospitals NHS Trust London UK

    Department of Radiology, Guy's and Saint Thomas' Hospitals NHS Trust, London, UK

  16. University of Cologne · King's College London · Guy's and St Thomas' NHS Foundation Trust · Evelina London Children's Healthcare · University Hospital Cologne · Max Planck Institute for Biology of Ageing

    Affiliation as printed

    Department of Neurology, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Department of Pediatric Neurology Evelina London Children's Hospital, Guy's & St Thomas NHS Foundation Trust London UK

    Department of Pediatrics and Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany

    Max Planck Institute for Biology of Aging and Cologne Excellence Cluster for Aging‐associated Diseases Cologne Germany

    Randall Center for Cell and Molecular Biophysics, Muscle Signaling Section, Faculty of Life Sciences and Medicine (FoLSM) King's College London London UK

    Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany

  17. Shahid Beheshti University · Shahid Beheshti University of Medical Sciences

    Affiliation as printed

    Faculty of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran

    Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

  18. University Health Network · University of Toronto · Krembil Brain Institute

    Affiliation as printed

    Edmond J Safra Program in Parkinson's Disease, Krembil Brain Institute, University Health Network and the Department of Medicine University of Toronto Toronto ON Canada

    Edmond J Safra Program in Parkinson's Disease, Krembil Brain Institute, University Health Network and the Department of Medicine, University of Toronto, Toronto, ON, Canada

  19. National Research Centre · Weill Cornell Medical College in Qatar · Weill Cornell Medicine

    Affiliation as printed

    Department of Neurology Weill Cornell Medicine Qatar, Education City Doha Qatar

    Medical Molecular Genetics Institute Human Genetics and Genome Research, National Research Centre Dokki Egypt

    Department of Neurology, Weill Cornell Medicine Qatar, Education City, Doha, Qatar

    Medical Molecular Genetics, Institute Human Genetics and Genome Research, National Research Centre, Dokki, Egypt

  20. University of Minnesota

    Affiliation as printed

    Department of Neurology University of Minnesota Minneapolis Minnesota USA

    Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA

  21. University of Minnesota

    Affiliation as printed

    Department of Neurology University of Minnesota Minneapolis Minnesota USA

    Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA

  22. Affiliation as printed

    Narges Medical Genetics and Prenatal Diagnosis Laboratory Ahvaz Iran

    Narges Medical Genetics and Prenatal Diagnosis Laboratory, Ahvaz, Iran

  23. Ahvaz Jundishapur University of Medical Sciences

    Affiliation as printed

    Department of Medical Genetics, Faculty of Medicine Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran

    Narges Medical Genetics and Prenatal Diagnosis Laboratory Ahvaz Iran

    Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

  24. Ahvaz Jundishapur University of Medical Sciences

    Affiliation as printed

    Diabetes Research Center, Health Research Institute Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran

    Narges Medical Genetics and Prenatal Diagnosis Laboratory Ahvaz Iran

    Diabetes Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

  25. Shahid Beheshti University · Shahid Beheshti University of Medical Sciences

    Affiliation as printed

    Faculty of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran

    Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

  26. Baylor College of Medicine

    Affiliation as printed

    Department of Pediatrics Baylor College of Medicine Houston TX USA

    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA

  27. Baylor College of Medicine

    Affiliation as printed

    Department of Pediatrics Baylor College of Medicine Houston TX USA

    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA

  28. Baylor College of Medicine

    Affiliation as printed

    Department of Molecular and Human Genetics Baylor College of Medicine Houston TX USA

    Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA

  29. Baylor College of Medicine

    Affiliation as printed

    Department of Pediatrics Baylor College of Medicine Houston TX USA

    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA

  30. Baylor College of Medicine

    Affiliation as printed

    Department of Pediatrics Baylor College of Medicine Houston TX USA

    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA

  31. Baylor College of Medicine · Baylor Genetics

    Affiliation as printed

    Baylor Genetics Laboratories Houston TX USA

    Department of Molecular and Human Genetics Baylor College of Medicine Houston TX USA

    Baylor Genetics Laboratories, Houston, TX, USA

    Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA

  32. Baylor College of Medicine · Texas Children's Hospital

    Affiliation as printed

    Department of Pathology Department of Pathology and Immunology Texas Children's Hospital Baylor College of Medicine Houston TX USA

    Department of Pathology, Department of Pathology and Immunology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA

  33. University College London

    Affiliation as printed

    Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children UCL GOS‐Institute of Child Health London UK

    Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, UCL GOS-Institute of Child Health, London, UK

  34. Lady Hardinge Medical College · Kalawati Saran Children's Hospital

    Affiliation as printed

    Department of Pediatrics Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital New Delhi India

    Department of Pediatrics, Lady Hardinge Medical College and Associated Kalawati Saran Children's Hospital, New Delhi, India

  35. Laboratoire National de Santé

    Affiliation as printed

    Institute for Clinical Genetics and Tumour Genetics Bonn Germany

    Laboratoire national de santé, National Center of Genetics, Dudelange, Luxembourg

    Institute for Clinical Genetics and Tumour Genetics, Bonn, Germany

  36. Krankenhaus St. Elisabeth und St. Barbara

    Affiliation as printed

    Department of Pediatrics Krankenhaus St. Elisabeth und St. Barbara Halle (Saale) Germany

    Department of Pediatrics, Krankenhaus St. Elisabeth und St. Barbara, Halle (Saale), Germany

  37. Heidelberg University · University Hospital Heidelberg

    Affiliation as printed

    Division of Child Neurology and Metabolic Medicine, Department of Pediatrics I, Center for Pediatrics and Adolescent Medicine, Medical Faculty Heidelberg, University Hospital Heidelberg Heidelberg University Heidelberg Germany

    Division of Child Neurology and Metabolic Medicine, Department of Pediatrics I, Center for Pediatrics and Adolescent Medicine, Medical Faculty Heidelberg, University Hospital Heidelberg, Heidelberg University, Heidelberg, Germany

  38. Boston Children's Hospital · Harvard University

    Affiliation as printed

    Movement Disorders Program, Department of Neurology, Boston Children's Hospital Harvard Medical School Boston MA USA

    Movement Disorders Program, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA

  39. Konya City Hospital

    Affiliation as printed

    Department of Medical Genetics Konya City Hospital Konya Turkey

    Department of Medical Genetics, Konya City Hospital, Konya, Turkey

  40. University of California, San Francisco

    Affiliation as printed

    Department of Pediatrics, Division of Medical Genetics University of California at San Francisco San Francisco CA USA

    Department of Pediatrics, Division of Medical Genetics, University of California at San Francisco, San Francisco, CA, USA

  41. University of Washington

    Affiliation as printed

    Division of Genetic Medicine, Department of Pediatrics University of Washington Seattle WA USA

    Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA, USA

  42. Affiliation as printed

    Christliches Kinderhospital Osnabrück Osnabrück Germany

  43. Monash Health · Monash University

    Affiliation as printed

    Department of Paediatrics Monash University Melbourne Vic Australia

    Monash Genetics Monash Health Melbourne Vic Australia

    Department of Paediatrics, Monash University, Melbourne, Vic, Australia

    Monash Genetics, Monash Health, Melbourne, Vic, Australia

  44. Sidra Medical and Research Center · Hamad bin Khalifa University

    Affiliation as printed

    Research Branch, Sidra Medicine, Doha; College of Health and Life Sciences Hamad Bin Khalifa University Doha Qatar

    Research Branch, Sidra Medicine, Doha

    Research Branch, Sidra Medicine, Doha; College of Health and Life Sciences Hamad Bin Khalifa University Doha Qatar

  45. Heinrich Heine University Düsseldorf

    Affiliation as printed

    Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty Heinrich‐Heine‐University Düsseldorf Germany

  46. München Klinik

    Affiliation as printed

    Department of Pediatrics Hospital Dritter Orden Munich Germany

    Department of Pediatrics, Hospital Dritter Orden, Munich, Germany

  47. St George’s University Hospitals NHS Foundation Trust

    Affiliation as printed

    St George's University Hospitals NHS Foundation Trust London UK

    St George's University Hospitals NHS Foundation Trust, London, UK

  48. University of Tartu

    Affiliation as printed

    Faculty of Medicine University of Tartu Tartu Estonia

    Faculty of Medicine, University of Tartu, Tartu, Estonia

  49. Amrita Institute of Medical Sciences and Research Centre

    Affiliation as printed

    Department of Pediatric Genetics Amrita Institute of Medical Sciences & Research Center Cochin India

    Department of Pediatric Genetics Amrita Institute of Medical Sciences & Research Center Cochin India

  50. Rebecca Sieff Hospital

    Affiliation as printed

    Department of Metabolic and Genetic Disorders Ziv, Medical Center Safed Israel

    Department of Metabolic and Genetic Disorders, Ziv, Medical Center, Safed, Israel

  51. Rebecca Sieff Hospital

    Affiliation as printed

    Department of Metabolic and Genetic Disorders Ziv, Medical Center Safed Israel

    Department of Metabolic and Genetic Disorders, Ziv, Medical Center, Safed, Israel

  52. Greater Baltimore Medical Center

    Affiliation as printed

    Harvey Institute for Human Genetics, Greater Baltimore Medical Center Baltimore MD USA

    Harvey Institute for Human Genetics, Greater Baltimore Medical Center, Baltimore, MD, USA

  53. Greater Baltimore Medical Center

    Affiliation as printed

    Harvey Institute for Human Genetics, Greater Baltimore Medical Center Baltimore MD USA

    Harvey Institute for Human Genetics, Greater Baltimore Medical Center, Baltimore, MD, USA

  54. Assistance Publique – Hôpitaux de Paris · Pitié-Salpêtrière Hospital · Université Pierre-et-Marie-Curie

    Affiliation as printed

    APHP, Hôpital Pitié‐Salpêtrière, Département de Génétique, Centre de Reference Déficience Intellectuelle de Causes Rares GRC UPMC Déficience Intellectuelle et Autisme Paris France

  55. Assistance Publique – Hôpitaux de Paris · Pitié-Salpêtrière Hospital · Université Pierre-et-Marie-Curie

    Affiliation as printed

    APHP, Hôpital Pitié‐Salpêtrière, Département de Génétique, Centre de Reference Déficience Intellectuelle de Causes Rares GRC UPMC Déficience Intellectuelle et Autisme Paris France

  56. Hôpitaux Universitaires de Strasbourg · Hôpital d'Hautepierre

    Affiliation as printed

    Service de Pédiatrie Centre Hospitalier Universitaire (CHU) de Strasbourg‐Hautepierre Strasbourg France

  57. Tartu University Hospital · University of Tartu

    Affiliation as printed

    Department of Clinical Genetics, Genetics and Personalized Medicine Clinic, Tartu University Hospital and Institute of Clinical Medicine University of Tartu Tartu Estonia

    Department of Clinical Genetics, Genetics and Personalized Medicine Clinic, Tartu University Hospital and Institute of Clinical Medicine, University of Tartu, Tartu, Estonia

  58. Government Medical College

    Affiliation as printed

    Department of Pediatric Neurology Government Medical College Thiruvananthapuram India

    Department of Pediatric Neurology, Government Medical College, Thiruvananthapuram, India

  59. University Medical Center Utrecht

    Affiliation as printed

    Department of Pediatric Neurology University Medical Center Utrecht Utrecht the Netherlands

    Department of Pediatric Neurology, University Medical Center Utrecht, Utrecht, the Netherlands

  60. Barts Health NHS Trust

    Affiliation as printed

    St Bart's Health NHS Trust London UK

    St Bart's Health NHS Trust, London, UK

  61. Leiden University Medical Center

    Affiliation as printed

    Department of Clinical Genetics Leiden University Medical Center Leiden the Netherlands

    Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands

  62. Emory University · Children's Healthcare of Atlanta

    Affiliation as printed

    Children's Healthcare of Atlanta Emory University Atlanta GA USA

    Children's Healthcare of Atlanta, Emory University, Atlanta, GA, USA

  63. Qatar University

    Affiliation as printed

    Department of Pathology, Sidra Medicine College of Medicine, Qatar University Doha Qatar

    Department of Pathology, Sidra Medicine, College of Medicine, Qatar University, Doha, Qatar

  64. University of Algiers Benyoucef Benkhedda

    Affiliation as printed

    Department of Pediatrics A, Hussein Dey University Hospital Center University of Algiers 1 Algiers Algeria

    Department of Pediatrics A, Hussein Dey University Hospital Center, University of Algiers 1, Algiers, Algeria

  65. Shaikh Khalifa Medical City

    Affiliation as printed

    Department of Pediatric Neurology Sheikh Khalifa Medical City Abu Dhabi United Arab Emirates

    Department of Pediatric Neurology, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates

  66. United Arab Emirates University

    Affiliation as printed

    Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences United Arab Emirates University Al Ain United Arab Emirates

    Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates

  67. Stanford University

    Affiliation as printed

    Stanford Children's Hospital Palo Alto CA USA

    Stanford Children's Hospital, Palo Alto, CA, USA

  68. Shahid Beheshti University · Shahid Beheshti University of Medical Sciences

    Affiliation as printed

    Department of Medical Genetics, Faculty of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran

    Genomic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran

    Genomic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

  69. Shahid Beheshti University · Shahid Beheshti University of Medical Sciences

    Affiliation as printed

    Genomic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran

    Genomic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

  70. Affiliation as printed

    Palindrome Isfahan Iran

    Palindrome, Isfahan, Iran

  71. Affiliation as printed

    Karyogen Lab Isfahan Iran

    Karyogen Lab, Isfahan, Iran

  72. University of Washington

    Affiliation as printed

    Department of Laboratory Medicine and Pathology University of Washington Seattle WA USA

    Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA

  73. Tarbiat Modares University

    Affiliation as printed

    Department of Medical Genetics, Faculty of Medical Sciences Tarbiat Modares University Tehran Iran

    Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran

  74. Cardiff and Vale University Health Board

    Affiliation as printed

    Cardiff and Vale UHB–AWMGS Cardiff UK

  75. Oxford University Hospitals NHS Trust

    Affiliation as printed

    Oxford University Hospitals NHS Foundation Trust Oxford UK

    Oxford University Hospitals NHS Foundation Trust, Oxford, UK

  76. Seattle Children's Hospital

    Affiliation as printed

    Neuroscience Institute, Center for Integrated Brain Research, Department of Neurology/Division of Pediatric Neurology, Seattle Children's Hospital Seattle WA USA

    Neuroscience Institute, Center for Integrated Brain Research, Department of Neurology/Division of Pediatric Neurology, Seattle Children's Hospital, Seattle, WA, USA

  77. Assiut University

    Affiliation as printed

    Department of Neurology, Faculty of Medicine Assiut University Assiut Egypt

    Department of Neurology, Faculty of Medicine, Assiut University, Assiut, Egypt

  78. Karadeniz Technical University

    Affiliation as printed

    Department of Pediatrics Neurology Karadeniz Technical University Trabzon Turkey

    Department of Pediatrics Neurology, Karadeniz Technical University, Trabzon, Turkey

  79. Centre Hospitalier Universitaire de Nantes

    Affiliation as printed

    Genetics Department Nantes University Hospital Nantes France

    Genetics Department, Nantes University Hospital, Nantes, France

  80. Centre Hospitalier Universitaire de Nantes

    Affiliation as printed

    Genetics Department Nantes University Hospital Nantes France

    Genetics Department, Nantes University Hospital, Nantes, France

  81. Centre Hospitalier Universitaire de Nantes

    Affiliation as printed

    Genetics Department Nantes University Hospital Nantes France

    Genetics Department, Nantes University Hospital, Nantes, France

  82. Erasmus MC

    Affiliation as printed

    Department of Clinical Genetics Erasmus MC University Medical Center Rotterdam the Netherlands

    Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, the Netherlands

  83. Erasmus MC

    Affiliation as printed

    Department of Clinical Genetics Erasmus MC University Medical Center Rotterdam the Netherlands

    Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, the Netherlands

  84. Erasmus MC

    Affiliation as printed

    Department of Clinical Genetics Erasmus MC University Medical Center Rotterdam the Netherlands

    Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, the Netherlands

  85. University of Skövde

    Affiliation as printed

    School of Health Science, Division Biomedicine and Translational Medicine University of Skovde Skovde Sweden

    School of Health Science, Division Biomedicine and Translational Medicine, University of Skovde, Skovde, Sweden

  86. UCL Queen Square Institute of Neurology · University College London

    Affiliation as printed

    Department of Neuromuscular Diseases UCL Queen Square Institute of Neurology London UK

    Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK

  87. University of Isfahan

    Affiliation as printed

    Department of Cell and Molecular Biology & Microbiology, Faculty of Science and Technology University of Isfahan Isfahan Iran

    Department of Cell and Molecular Biology & Microbiology, Faculty of Science and Technology University of Isfahan Isfahan Iran

  88. Mashhad University of Medical Sciences

    Affiliation as printed

    Department of Neurology Mashhad University of Medical Sciences Mashhad Iran

    Department of Neurology, Mashhad University of Medical Sciences, Mashhad, Iran

  89. Mashhad University of Medical Sciences

    Affiliation as printed

    Department of Neurology Mashhad University of Medical Sciences Mashhad Iran

    Department of Neurology, Mashhad University of Medical Sciences, Mashhad, Iran

  90. Mashhad University of Medical Sciences

    Affiliation as printed

    Department of Pediatrics, School of Medicine Mashhad University of Medical Sciences Mashhad Iran

    Rare Pediatric Neurological Diseases Research Center Mashhad University of Medical Sciences Mashhad Iran

    Rare Pediatric Neurological Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

  91. North Khorasan University of Medical Sciences

    Affiliation as printed

    Department of Pediatrics North Khorasan University of Medical Sciences Bojnurd Iran

    Department of Pediatrics, North Khorasan University of Medical Sciences, Bojnurd, Iran

  92. King Abdullah International Medical Research Center · National Guard Health Affairs

    Affiliation as printed

    Department of Genetics and Precision Medicine King Abdullah Specialized Children's Hospital, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs Riyadh Saudi Arabia

    Department of Genetics and Precision Medicine, King Abdullah Specialized Children's Hospital, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia

  93. University of Utah

    Affiliation as printed

    Division of Medical Genetics, Department of Pediatrics University of Utah Salt Lake City UT USA

    Division of Medical Genetics, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA

  94. Hôpital Necker-Enfants Malades

    Affiliation as printed

    Service de Médecine Génomique des Maladies Rares Hôpital Necker‐Enfants Malades Paris France

  95. Hôpital Necker-Enfants Malades

    Affiliation as printed

    Service de Médecine Génomique des Maladies Rares Hôpital Necker‐Enfants Malades Paris France

  96. Children's Memorial Health Institute

    Affiliation as printed

    Department of Medical Genetics Children's Memorial Health Institute Warsaw Poland

    Department of Medical Genetics, Children's Memorial Health Institute, Warsaw, Poland

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References 45