1. Chair of Healthcare Management and Health Services Research, University of Bayreuth, Parsifalstrasse 25, 95445 Bayreuth, Germany
2. Friedrich Baur Institute at the Department of Neurology, LMU University Hospital, LMU Munich, Ziemssenstrasse 1, 80336 Munich, Germany
3. Department of Neurology, University Medical Center Goettingen, 37075 Goettingen, Germany