1. Medical Genetics Center (MGZ) , 80335 Munich , Germany
2. Friedrich-Baur-Institute, Department of Neurology, Klinikum der Universität, Ludwig-Maximilians-Universität , 80336 Munich , Germany
3. Department of Medicine IV, Klinikum der Universität, Ludwig-Maximilians-Universität , 80336 Munich , Germany
4. Center for Genetic Medicine Research, Children’s National Research Institute, Children’s National Hospital , Washington, DC 20010 , USA
5. Department of Genomics and Precision Medicine, School of Medicine and Health Sciences, The George Washington University , Washington, DC 20037 , USA