1. Department of Neurology at St. Josef Hospital, Medical Faculty of the Ruhr-University Bochum, Gudrunstr. 56, D-44791 Bochum, Germany Department of Neurology at Katholische Kliniken Ruhrhalbinsel Essen, Heidbergweg 22-24, D-45257 Essen, Germany
2. Department of Neurology at St. Josef Hospital, Medical Faculty of the Ruhr-University Bochum, Bochum, Germany
3. Department of Neurology at St. Josef Hospital, Medical Faculty of the Ruhr-University Bochum, Bochum, Germany Department of Neurology at Katholische Kliniken Ruhrhalbinsel Essen, Essen, Germany
4. Department of Neurology at Katholische Kliniken Ruhrhalbinsel Essen, Essen, Germany