1. Department of NeurologyColumbia University Medical Center New York NY
2. Institute for Genomic MedicineColumbia University Medical Center New York NY
3. Section of Pharmacology, Department of NeuroscienceUniversity of Naples “Federico II,” Naples Italy
4. Department of Medical Genetics, Reference Center for Developmental AnomaliesCivil Hospices of Lyon Lyon France
5. French Institute of Health and Medical Research U1028, French National Center for Scientific Research UMR5292Center for Research in Neuroscience in Lyon, Genetics of Neurodevelopment Team, Claude Bernard University Lyon 1 Lyon France
6. Claude Bernard University Lyon 1 Lyon France
7. Division of Genetic Medicine, Department of PediatricsUniversity of Washington Seattle WA
8. Seattle Children's Hospital Seattle WA
9. Department of Paediatrics and Child HealthUniversity of Otago Wellington New Zealand
10. Children's NeurologySt Luke's Children's Hospital Boise ID
11. Center for Rett Syndrome, Department of Pediatrics and Adolescent MedicineNational Hospital Copenhagen Denmark
12. Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet and Department of Clinical MedicineUniversity of Copenhagen Copenhagen Denmark
13. French Institute of Health and Medical Research U1231, Laboratory of Cognitive Neuroscience UMR1231, Genetics of Developmental AnomaliesBurgundy University F‐21000 Dijon France
14. Department of Medicine and Health Sciences “Vincenzo Tiberio”University of Molise Campobasso Italy
15. University of Melbourne, Austin Health, Royal Children's HospitalFlorey and Murdoch Institutes Melbourne Victoria Australia
16. Department of NeurologyUniversity of California San Francisco San Francisco CA
17. Departments of Pediatrics and NeurologyJohns Hopkins School of Medicine Baltimore MD
18. Pediatric Neurology, INTEGRIS Baptist Medical Center Oklahoma City OK
19. Division of Medical Genetics, Department of PediatricsDuke University Durham NC
20. Molecular Genetic UnitStrasbourg University Hospital Strasbourg France
21. Genetics Department, Reference Center for Developmental AnomaliesClermont‐Ferrand University Hospital Clermont‐Ferrand France
22. Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of Copenhagen Copenhagen Denmark
23. Reference Center for Developmental Disorders, Department of Medical Genetics, Arnaud de Villeneuve HospitalMontpellier University Hospital Montpellier France
24. Department of Pediatric NeurologyUniversity Hospital of Montpellier, and Physiology and Experimental Medicine of Heart and Muscle Unit, University of Montpellier, National Institute for Health and Medical Research, French National Center for Scientific Research Montpellier France
25. Functional Unit 12, Innovation in Genomic Diagnosis of Rare DiseasesUniversity Hospital Dijon‐Bourgogne Dijon France
26. Division of Neurology, Department of PediatricsChildren's Hospital of Pittsburgh and University of Pittsburgh School of Medicine Pittsburgh PA
27. Department of Radiology and Biomedical ImagingUniversity of California San Francisco San Francisco CA
28. Neurogenetics GroupUniversity of Antwerp Antwerp Belgium
29. Neurology DepartmentUniversity Hospital Antwerp Antwerp Belgium
30. Departments of Neurology, Neuroscience, and Molecular and Human GeneticsBaylor College of Medicine Houston TX
31. Departments of Pediatrics and Institute of Experimental and Clinical ResearchUniversity of Louvain Brussels Belgium