1. Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of Munich, Munich, Germany
2. Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
3. Department of Radiology, Ludwig-Maximilians-University of Munich, Munich, Germany
4. National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
5. Muscle Disease Unit, Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA