1. Institute for Medical Information Processing, Biometry and Epidemiology; Ludwig-Maximilians-Universität München; Munich Germany
2. Epidemiology, Biostatistics and Prevention Institute; University of Zürich; Zurich Switzerland
3. lnstitute of Clinical Neuroimmunology; Ludwig-Maximilians-Universität München; Munich Germany
4. Pettenkofer School of Public Health; Munich Germany
5. Main Library; University of Zurich; Zurich Switzerland
6. Clinic for Neurology; University Hospital Zurich; Zurich Switzerland