1. CeGaT GmbH and Praxis für Humangenetik Tübingen; Tuebingen Germany
2. Department of Neurology; Medical Faculty; RWTH Aachen University; Aachen Germany
3. Institute for Clinical Chemistry; University Hospital Zürich; Zurich Switzerland
4. Department of Pediatric Neurology Klinikum Stuttgart; Olgahospital, Stuttgart Germany
5. Faculty of Health; Witten/Herdecke University; Witten Germany
6. JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging; Forschungszentrum Jülich GmbH and RWTH Aachen University; Aachen Germany
7. Department of Neurology; University Hospitals Leuven and University of Leuven (KU Leuven); Leuven Belgium
8. Institute of Neuropathology; Medical Faculty; RWTH Aachen University; Aachen Germany
9. Department of Neurology; Klinikum Kassel; Kassel Germany
10. Department of Neurology and Epileptology; Hertie Institute for Clinical Brain Research; University of Tübingen; Tuebingen Germany
11. Department of Neuropediatrics; Children's Hospital Oldenburg; Oldenburg Germany
12. Department of Neurology; University of Basel Hospital; Basel Switzerland
13. Department of Neurology; Deutsche Klinik für Diagnostik; Wiesbaden Germany
14. Department of General Pediatrics; Division of Inherited Metabolic Diseases; University Children's Hospital; Heidelberg Germany
15. Department of Neuropediatrics; University Hospital Münster; Muenster Germany
16. Department of Sleep Medicine and Neuromuscular Disorders; University Hospital Münster; Muenster Germany
17. Department of Neurology; Friedrich-Baur-Institute; Ludwig-Maximilians-University of Munich; Munich Germany