1. Department of Clinical Genetics Rigshospitalet Copenhagen Denmark
2. Department of Neuropediatrics University Children’s Hospital Tübingen Tübingen Germany
3. Department of Clinical Neurophysiology Rigshospitalet Copenhagen Denmark
4. Department of Neuroscience University of Copenhagen Copenhagen Denmark
5. Department of Neurology Johns Hopkins School of Medicine Baltimore MarylandUSA
6. Shire (a member of the Takeda group of companies) Lexington MassachusettsUSA