Author information:
(1)Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA 
19104, USA.
(2)Department of Neurology and Epileptology, Hertie Institute for Clinical Brain 
Research, University of Tübingen, 72076 Tübingen, Germany.
(3)Department of Physiology & Pharmacology, Hotchkiss Brain Institute and 
Alberta Children's Hospital Research Institute, University of Calgary, Calgary, 
AB T2N 1N4, Canada.
(4)Division of Genetic Medicine, University of Washington, Seattle, WA 98195, 
USA.
(5)APHP, Département de Génétique, Centre de Référence Déficiences 
Intellectuelles de Causes Rares, Groupe Hospitalier Pitié Salpêtrière et GHUEP 
Hôpital Trousseau; Sorbonne Université, GRC "Déficience Intellectuelle et 
Autisme," 75013 Paris, France.
(6)Sorbonne Université, GRC n°19, Pathologies Congénitales du 
Cervelet-LeucoDystrophies, Département de Génétique et Embryologie Médicale, 
AP-HP, Hôpital d'Enfants Armand Trousseau, Centre de Référence des Déficits 
Intellectuels de Causes Rares, 75012 Paris, France.
(7)Sorbonne Université, GRC n°19, Pathologies Congénitales du 
Cervelet-LeucoDystrophies, Service de Neuropédiatrie, AP-HP, Hôpital d'Enfants 
Armand Trousseau; Centre de Référence des Déficits Intellectuels de Causes 
Rares; Inserm U 1141, 75012 Paris, France.
(8)Department of Clinical Genetics, Odense University Hospital, 5000 Odense, 
Denmark; H.C. Andersen Children's Hospital, Odense University Hospital, 5000 
Odense, Denmark.
(9)Department of Clinical Genetics, Odense University Hospital, 5000 Odense, 
Denmark.
(10)Department of Human Genetics, Radboud University Medical Center, 6525 
Nijmegen, the Netherlands.
(11)Stichting Epilepsie Instellingen Nederland, 8025 Zwolle, the Netherlands.
(12)Department of Neurology, Academic Center for Epileptology, Kempenhaeghe and 
Maastricht UMC, 5591 Heeze, the Netherlands.
(13)Barrow Neurological Institute, Phoenix Children's Hospital, Departments of 
Child Health, Genetics, Neurology, and Cellular & Molecular Medicine, University 
of Arizona College of Medicine, Phoenix, AZ 85013, USA.
(14)Division of Genetics and Metabolism, Phoenix Children's Hospital, Phoenix, 
AZ 85016, USA.
(15)Yale School of Medicine, New Haven, CT 06510, USA.
(16)Department of Pediatric Neurology, Penteli Children's Hospital, 152 36 
Athens, Greece.
(17)Institute of Biomedical Science and Children's Hospital Fudan University, 
201102 Shanghai, China.
(18)Perinatal Center, Sahlgrenska Academy, Gothenburg University, 413 46 
Gothenburg, Sweden; Hospital of Zhengzhou University, 450001 Zhengzhou, China.
(19)Epilepsy Research Centre, Department of Medicine, The University of 
Melbourne, Austin Health, Heidelberg, VIC 3084, Australia.
(20)Department of Health Science Research, Mayo Clinic, Rochester, MN 55905, 
USA.
(21)Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 
55905, USA.
(22)Department of Health Science Research, Mayo Clinic, Rochester, MN 55905, 
USA; Center for Individualized Medicine, Mayo Clinic, Rochester, MN 55905, USA.
(23)Center for Individualized Medicine, Mayo Clinic, Rochester, MN 55905, USA; 
Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA.
(24)University of Illinois Chicago College of Medicine, University of Illinois 
College of Medicine at Peoria, Peoria, IL 61605, USA.
(25)Adult Genetics Unit, Royal Adelaide Hospital, and School of Medicine, 
University of Adelaide, Adelaide, SA 5000, Australia.
(26)Department of Neurology, Women's and Children's Hospital, University of 
Adelaide, North Adelaide, SA 5006, Australia.
(27)Center for Human Disease Modeling, Duke University Medical Center, Durham, 
NC 27701, USA.
(28)Adelaide Medical School, Robinson Research Institute, University of 
Adelaide, North Adelaide, SA 5006, Australia.
(29)CeGaT, 72076 Tübingen, Germany.
(30)Department of Human Genetics, University of Tübingen, 72076 Tübingen, 
Germany.
(31)Division of Genetics and Genomics and Department of Neurology, Boston 
Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard 
Medical School, Boston, MA 02215, USA.
(32)Northeast Regional Epilepsy Group, Hackensack University Medical Center, 
Hackensack, NJ 07601, USA.
(33)University of Louisville, Louisville, KY 40292, USA.
(34)Children's Hospital of Wisconsin, Milwaukee, WI 53226, USA.
(35)Division of Medical Genetics, Department of Pediatrics, University of Utah, 
Salt Lake City, UT 84113, USA.
(36)Division of Pediatric Neurology, Departments of Pediatrics and Neurology, 
University of Utah, Salt Lake City, UT 84113, USA.
(37)ARUP Laboratories, Salt Lake City, UT 84108, USA.
(38)Division of Metabolic Disorders CHOC Children's Hospital, Orange, CA 92868, 
USA.
(39)Division of Metabolic Disorders CHOC Children's Hospital, Orange, CA 92868, 
USA; Department of Pediatrics, University of California-Irvine School of 
Medicine, Irvine, CA 92617, USA.
(40)Centre for Brain Research and School of Biological Sciences, The University 
of Auckland, Auckland 1142, New Zealand.
(41)Department of Neurology, Starship Children's Health, Auckland 1023, New 
Zealand.
(42)Department of Paediatrics and Child Health, University of Otago Wellington, 
Wellington South 6242, New Zealand.
(43)Department of Clinical Genetics, Karolinska University Hospital, 171 76 
Stockholm, Sweden; Department of Molecular Medicine and Surgery, Karolinska 
Institutet, 171 77 Stockholm, Sweden.
(44)Department of Molecular Medicine and Surgery, Karolinska Institutet, 171 77 
Stockholm, Sweden.
(45)Department of Neuroscience, Azienda Ospedaliero-Universitaria Meyer, 
University of Florence, 50139 Florence, Italy.
(46)Greenwood Genetic Center, Greenwood, SC 29646, USA.
(47)Medical Genetics, Sanford Health, Bemidji, MN 56601, USA.
(48)Medical Genetics, Sanford Health, Fargo, ND 58102, USA.
(49)Epilepsy Genetics Program, Department of Neurology, Boston Children's 
Hospital, Boston, MA 02115, USA; Department of Neurology, Harvard Medical 
School, Boston, MA 02215, USA.
(50)Epilepsy Genetics Program, Department of Neurology, Boston Children's 
Hospital, Boston, MA 02115, USA.
(51)Department of Neurology, Harvard Medical School, Boston, MA 02215, USA; 
Department of Neurology, Boston Children's Hospital, Boston, MA 02115, USA.
(52)Department of Haematology, University of Cambridge, NHS Blood and Transplant 
Centre, Cambridge CB2 0QQ, UK; NIHR BioResource - Rare Diseases, Cambridge 
University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, 
Cambridge CB2 0QQ, UK.
(53)Clinical Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter EX2 
5DW, UK.
(54)Department of Neurology, Royal Devon and Exeter NHS Foundation Trust, Exeter 
EX2 5DW, UK.
(55)NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS 
Foundation Trust, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK; Department 
of Medical Genetics, Cambridge Institute for Medical Research, University of 
Cambridge, Cambridge CB2 0XY, UK.
(56)Yorkshire Regional Genetics Service, Chapel Allerton Hospital Leeds Teaching 
Hospitals NHS Trust, Leeds LS7 4SA, UK.
(57)Division of Evolution and Genomic Sciences, School of Biological Sciences, 
Faculty of Biology, Medicine and Health, The University of Manchester, 
Manchester M13 9PL, UK; Manchester Centre for Genomic Medicine, St. Mary's 
Hospital, Manchester University Foundation NHS Trust, Health Innovation, 
Manchester M13 9WL, UK.
(58)Department of Paediatric Neurology, Royal Manchester Children's Hospital, 
Manchester University Foundation NHS Trust, Health Innovation, Manchester M13 
9WL, UK.
(59)Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester 
University Foundation NHS Trust, Health Innovation, Manchester M13 9WL, UK.
(60)Wellcome Sanger Institute, Cambridge CB10 1SA, UK.
(61)Epilepsy Research Centre, Department of Medicine, The University of 
Melbourne, Austin Health, Heidelberg, VIC 3084, Australia; The Florey Institute 
and Murdoch Children's Research Institute, Parkville, VIC 3052, Australia; 
Department of Paediatrics, The University of Melbourne, Royal Children's 
Hospital, Parkville, VIC 3052, Australia; Department of Neurology, Royal 
Children's Hospital, Parkville, VIC 3052, Australia.
(62)Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA 
19104, USA; Department of Neuropediatrics, Christian-Albrechts-University of 
Kiel, 24105 Kiel, Germany.
(63)Division of Genetic Medicine, University of Washington, Seattle, WA 98195, 
USA. Electronic address: hmefford@uw.edu.