1. Columbia University Medical Center, Institute for Genomic Medicine New York NY
2. Department of Clinical Genetics and School for Oncology and Developmental BiologyMaastricht University Medical Center Maastricht the Netherlands
3. Department of Human Genetics, Donders Institute for Brain, Cognition, and BehaviorRadboud University Medical Center Nijmegen the Netherlands
4. Department of NeurologyColumbia University Department of Neurology New York NY
5. Department of NeurologyMaastricht University Medical Center Maastricht the Netherlands
6. Academic Center for EpileptologyKempenhaeghe/Maastricht University Medical Center Maastricht the Netherlands
7. School for Mental Health and NeuroscienceMaastricht University Maastricht the Netherlands
8. Department of Clinical GeneticsRadboud University Medical Center Nijmegen the Netherlands
9. Cook Children's Hospital Fort Worth TX
10. GeneDx Gaithersburg MD
11. Medical GeneticsUniversity of British Columbia Vancouver British Columbia Canada
12. University of Burgundy–Franche‐Comté, UMR1231 GAD, INSERM Dijon France
13. Dijon Bourgogne University Hospital Center, Rare Diseases Reference Center “Developmental Anomalies and Informational Syndromes,” Genetic Center, FHU‐TRANSLAD Dijon France
14. Department of Biochemistry and GeneticsAngers University Hospital Center Angers France
15. Clinical GeneticsLeiden University Medical Center Leiden the Netherlands
16. Center for Molecular Neurology, VIB, Neurogenetics Group Antwerp Belgium
17. Laboratory of Neurogenetics, Institute Born‐BungeUniversity of Antwerp Antwerp Belgium
18. Department of NeurologyUniversity Hospital Antwerp Antwerp Belgium
19. Pediatric Neurology Clinic, Al Obregia HospitalCarol Davila University of Medicine Bucharest Romania
20. Department of Pediatric NeurologyUniversity Hospital Antwerp Antwerp Belgium
21. Institute for Human GeneticsUniversity of Leipzig Hospitals and Clinics Leipzig Germany
22. Pediatric Neurology Unit, Child and Adolescent DepartmentUniversity Hospitals Geneva Switzerland
23. Department of PediatricsUniversity of Washington Seattle WA
24. Bethesda Children's Hospital, Department of Neurology Budapest Hungary
25. HudsonAlpha Institute for Biotechnology Huntsville AL
26. Department of NeurologyUniversity of Alabama at Birmingham Birmingham AL
27. Language and Genetics DepartmentMax Planck Institute for Psycholinguistics Nijmegen the Netherlands
28. Department of Genetics, University Medical Center GroningenUniversity of Groningen Groningen the Netherlands
29. University Medical Center Utrecht, Department of Genetics Utrecht the Netherlands
30. Division of Clinical Genetics, Department of Pediatrics, New York‐Presbyterian Morgan Stanley Children's HospitalColumbia University Medical Center New York NY
31. Genetics ServiceNantes University Hospital Center Nantes France
32. Genetics ServicePoitiers University Hospital Center Poitiers France
33. University of Poitiers, EA3808 NEUVACOD Poitiers France
34. Department of Pathology and Cell BiologyColumbia University Medical Center New York NY