1. INSERM, U679, Paris, France
2. Pierre and Marie Curie‐Paris6 University, UMR S679, Pitié‐Salpêtrière Hospital, Paris, France
3. Federative Institute for Neuroscience Research (IFR70), Pitié‐Salpêtrière Hospital, Paris, France
4. AP‐HP, Pitié‐Salpêtrière Hospital, Department of Genetics and Cytogenetics, Paris, France
5. Neurology B and Neurogenetics unit, Specialties hospital, Rabat, Morocco
6. Généthon, Evry, France
7. Genoscope, CNS, Evry, France
8. National Genotyping Center, Evry, France
9. Centre for Developmental Neurobiology, King's College London, Guy's Hospital Campus, United Kingdom
10. AP‐HP, Pitié‐Salpêtrière Hospital, Federation of Neurology, Paris, France