1. Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
2. Department of Neurology, University Hospital Bern and University of Bern, Bern, Switzerland/Neurology and Neurorehabilitation Centre, Lucerne Cantonal Hospital, Lucerne, Switzerland
3. Department of Neurology, University Hospital Bern and University of Bern, Bern, Switzerland
4. Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland/Division of Occupational and Environmental Medicine, University of Zurich and University Hospital Zurich, Zurich, Switzerland
5. Neuropsychology and Behavioral Neurology Unit, Division of Molecular and Cognitive Neuroscience, Department of Psychology, University of Basel, Basel, Switzerland
6. Laboratories of Neuroimmunology, Division of Neurology and Neuroscience Research Center, Department of Clinical Neurosciences, Lausanne University Hospital, Lausanne, Switzerland
7. Neuroimmunology and Multiple Sclerosis Research, Department of Neurology, University Hospital Zurich, Zurich, Switzerland/Center for Neuroscience Zurich, Federal Institute of Technology (ETH), Zurich, Switzerland
8. Neurocenter of Southern Switzerland, Ospedale regionale di Lugano, Lugano, Switzerland
9. Department of Neurology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
10. Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland/Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric Hospital, University of Zurich, Zurich, Switzerland
11. Department of Neurology and Neurorehabilitation, Rehabilitation Centre Kliniken Valens, Valens, Switzerland