1. Division of NeurologyChildren's Hospital of Philadelphia Philadelphia Pennsylvania USA
2. Department of NeuropediatricsChristian‐Albrechts‐University of Kiel Kiel Germany
3. Autism & Developmental Medicine InstituteGeisinger Health System Lewisburg Pennsylvania USA
4. Department of NeurologyEpilepsy Center Frankfurt Rhine‐MainGoethe UniversityFrankfurt am Main Frankfurt Germany
5. Department of NeurologyEpilepsy Center HessenPhilipps University, Marburg Marburg Germany
6. Children's Hospital of Eastern Ontario Research InstituteUniversity of Ottawa Ottawa Canada
7. Department of GeneticsUniversity of North Carolina Chapel Hill North Carolina USA
8. Department of Pathology and Laboratory MedicineWestern University Molecular Genetic LaboratoryLondon Health Sciences London Ontario Canada
9. Division of Child NeurologyColumbia University Medical Center New York New York USA
10. Department of Human GeneticsUniversity of Michigan Ann Arbor Michigan USA
11. Quest DiagnosticsAthena Diagnostics Marlborough Massachusetts USA
12. Departments of Pediatrics and NeurologyUniversity of California San Francisco California USA
13. Center for Integrative Brain ResearchSeattle Children's Research Institute Seattle Washington USA
14. Department of PediatricsUniversity of Washington Seattle Washington USA
15. Department of Pediatrics and NeurologyUniversity of Colorado School of Medicine Aurora Colorado USA
16. Department of NeurologyUniversity of Virginia Charlottesville Virginia USA
17. GeneDx Gaithersburg Maryland USA
18. Department of NeurologyUniversity of Pennsylvania Philadelphia Pennsylvania USA
19. Pediatric Neurology and Muscular Diseases UnitDINOGMI‐Department of NeurosciencesRehabilitationOphthalmology, Genetics, Maternal and Child Health“G. Gaslini” InstituteUniversity of Genoa Genova Italy
20. Epilepsy Genetics ProgramDepartment of NeurologyBoston Children's Hospital Boston Massachusetts USA
21. Laboratory for Molecular MedicinePartners Healthcare Personalized Medicine Cambridge Massachusetts USA
22. Division of Genetic MedicineUniversity of Washington Seattle Washington USA