1. Center for Rare Diseases Göttingen, University Medical Center Göttingen, Georg August University Göttingen, Göttingen, Germany
2. Max-Planck-Institute for Experimental Medicine, Göttingen, Germany
3. Center for Neurology, Asklepios Hospitals Schildautal, Seesen, Germany
4. Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University Göttingen, Göttingen, Germany