1. Department of Neurology and Clinical Neurophysiology; Schön Klinik München Schwabing; Munich Germany
2. Kliniken Beelitz; Neurological Rehabilitation Medical Centre; Beelitz-Heilstätten Germany
3. Department of Neurology; Kantonsspital Münsterlingen; Münsterlingen Switzerland
4. Kliniken Beelitz; Parkinson's Disease and Movement Disorders; Beelitz-Heilstätten Germany
5. Department of Neurological Rehabilitation and Physical Medicine; Vivantes Klinikum Spandau; Berlin Germany