1. Molecular Diagnostic Laboratory and Division of Medical Genetics, Department of PediatricsSaint Justine University Hospital CenterMontreal Canada
2. Department of NeuroscienceUniversity of MontrealMontreal Canada
3. Institute of Human GeneticsUniversity Medical Center Hamburg‐EppendorfHamburg Germany
4. Department of NeurologyNorthwestern University, Feinberg School of MedicineChicago IL
5. Department of PediatricsUniversity Medical Center Hamburg‐EppendorfHamburg Germany
6. Institute of Human Genetics, Helmholtz Center MunichNeuherberg Germany
7. Institute of Human GeneticsTechnical University MunichMunich Germany
8. Maine Medical Partners Pediatric Specialty CarePortland ME
9. Department of NeurologyBoston Children's HospitalBoston MA
10. Department of PathologyMcGill University, Montreal Neurological InstituteMontreal Canada
11. Molecular Neurogenetics Unit, Institute for Research and Health Care (IRCCS) Foundation Carlo Besta Neurological InstituteMilan Italy
12. GeneDxGaithersburg MD
13. Kadlec Clinic Genetic CounselingRichland WA
14. Division of Genetic Medicine, Department of PediatricsSeattle Children's Hospital and University of WashingtonSeattle WA
15. Department of PediatricsSaint Justine University Hospital Center and University of MontrealMontreal Canada
16. Montreal Neurological Institute, Department of Neurology and NeurosurgeryMcGill UniversityMontreal Canada