1. Department of Neurology; University Medical Centre of the Johannes Gutenberg University; Mainz Germany
2. Department of Neurology; German Center for Vertigo and Balance Disorders-IFB; Ludwig-Maximilians-University; Munich Germany
3. Munich Center for Systems Neurology (SyNergy); Germany
4. Roman Rolke; Department of Palliative Medicine; University of Bonn; Germany
5. Department of Neurology; University Medical Centre; Erlangen Germany
6. Faculty of Psychology; Murdoch University; Perth Australia