1. Department of Neurophysiology, Medical Faculty Mannheim, Center of Biomedicine and Medical Technology University of Heidelberg Mannheim Germany
2. Center for Pain Medicine, BG University Hospital Bergmannsheil Ruhr University Bochum Bochum Germany
3. Department of Neurology University Hospital Würzburg Würzburg Germany
4. Department of Neurology Ulm University Ulm Germany
5. Department of Endocrinology, Medical Faculty Mannheim University of Heidelberg Mannheim Germany
6. MRC Systems GmbH Heidelberg Germany