1. Department of Neurology; Philipps-University Marburg; Marburg Germany
2. Department of Public Health and Health Technology Assessment; UMIT-University for Health Sciences, Medical Informatics, and Technology; Hall in Tirol Austria
3. Institute for Technology Assessment and Department of Radiology; Massachusetts General Hospital; Harvard Medical School; Boston Massachusetts USA
4. Department of Health Policy and Management; Harvard School of Public Health; Boston Massachusetts USA
5. Department of Neurology; Julius-Maximilians-University; Würzburg Germany
6. Department of Neurology; Christian-Albrechts-University; Kiel Germany