1. Faculty of Medicine and the Faculty of Mathematics and Natural Sciences Center for Molecular Medicine Cologne (CMMC), University of Cologne Cologne Germany
2. Faculty of Medicine and University Hospital Cologne, Department of Pediatrics University of Cologne Cologne Germany
3. Faculty of Medicine and University Hospital Cologne, Department of Neurology University of Cologne Cologne Germany
4. Department of Pediatric Neurology Hacettepe University Ankara Turkey
5. Cologne Center for Genomics, University of Cologne Cologne Germany
6. Department of Neurology Ege University School of Medicine Izmir Turkey
7. The Dubowitz Neuromuscular Centre, National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre, UCL Great Ormond Street Institute of Child Health London UK
8. Medical School, Sigmund Freud Private University Vienna Austria
9. Center for Medical Genetics, Hanusch Hospital Vienna Austria