1. Institute of Human Genetics, GSF‐National Research Center for Environment and Health, Neuherberg, Germany
2. Molecular Neurogenetics, National Neurological Institute “Carlo Besta,” Milan, Italy
3. Department of Child Neurology, National Neurological Institute “Carlo Besta,” Milan, Italy
4. Department of Neurology, Memorial Children's Health Institute, Warsaw, Poland
5. Department of Neurology, Klinikum Grosshadern, Ludwig‐Maximilians‐University, Munich
6. Department of Pediatrics and Pediatric Neurology, University of Goettingen, Goettingen, Germany
7. Institute of Neurology, Clinical Center and Institute of Biology and Human Genetics, School of Medicine, University of Belgrade, Belgrade, Serbia, and Montenegro
8. Department of Neuropediatrics, Charité University Medical School, Berlin, Germany
9. Department of Neurology, Technical University of Munich, Munich, Germany
10. Institute of Human Genetics, Technical University of Munich, Munich, Germany