1. MS Research and Project Development Hannover Germany
2. Society for Health Care Research Hannover Germany
3. Department 5, Epidemiology & Health Care Atlas Central Research Institute of Ambulatory Health Care in the Federal Republic of Germany Berlin Germany
4. German Multiple Sclerosis Society Hannover Germany
5. Department of Neurology Medical University of Vienna Vienna Austria
6. Neuroimmunological Section Department of Neurology University Medical Center Rostock Rostock Germany