1. Medical Genetics Center (MGZ), 80335 Munich, Germany
2. Center for Genetic Medicine Research, Children’s National Research Institute, Children’s National Hospital, Washington, DC 20012, USA
3. Institute of Medical Biochemistry and Molecular Biology, University Medicine of Greifswald, 17489 Greifswald, Germany
4. Friedrich-Baur-Institute, Department of Neurology, Klinikum der Universität, Ludwig-Maximilians-Universität, 80336 Munich, Germany
5. Department of Medicine IV, Klinikum der Universität, Ludwig-Maximilians-Universität, 80336 Munich, Germany