1. Department of Neuropediatrics and Muscle Disorders, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
2. Department of Neuropediatrics, Children’s Hospital 1, University of Duisburg-Essen, Essen, Germany
3. Department of Neuropediatrics, University Children’s Hospital Muenster, Muenster, Germany
4. Departement of Child Neurology, University Hospital Giessen, Justus-Liebig-University, Giessen, Germany
5. Department of Pediatrics, Neuropediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Department of Neuropediatrics, Charité – Universitätsmedizin Berlin, Berlin, Germany
7. Department of Pediatrics and Neuropediatrics, DRK Klinikum Westend, Berlin, Germany