1. Department of Neurology, University Hospital Giessen and Marburg, Giessen, Germany
2. Department of Neurology/Geriatrics, Diakonie Klinikum Jung-Stilling, Siegen, Germany
3. Faculty of Languages and Literatures, Department I, Ludwig-Maximilians-University (LMU), Munich, Germany, and
4. Department of Anaesthesiology, University Hospital Mainz, Mainz, Germany