1. Swiss Multiple Sclerosis Registry Epidemiology, Biostatistics and Prevention Institute University of Zürich Zürich Switzerland
2. Departments of Medicine Neurologic Clinic and Policlinic University Hospital Basel and University of Basel Basel Switzerland
3. Clinical Trial Unit University Hospital Basel Basel Switzerland
4. Swiss Association for Joint Tasks of Health Insurers Solothurn Switzerland
5. Department of Neurology Rheinburg Klinik Walzenhausen Switzerland