1. Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
2. The Alfred Hospital, Melbourne, VIC, Australia
3. Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
4. Turku University Hospital Neurocenter and Division of Clinical Neurosciences, University of Turku, Turku, Finland
5. Center of Clinical Neuroscience, Department of Neurology, Dresden University of Technology, Dresden, Germany
6. Multiple Sclerosis Center and Research Center for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
7. Department of Neurology, University Hospital and University of Basel, Basel, Switzerland
8. Norwegian MS Registry and Biobank, Department of Neurology, Haukeland University Hospital, Bergen, Norway
9. Department of Clinical Medicine, University of Bergen, Bergen, Norway
10. Danish Multiple Sclerosis Center and the Danish Multiple Sclerosis Registry, Department of Neurology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
11. Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
12. Bordeaux PharmacoEpi (BPE), Université de Bordeaux, Bordeaux, France
13. EMD Serono Research & Development Institute, Inc, Billerica, MA, USA, an affiliate of Merck KGaA
14. Global Epidemiology, IQVIA, Amsterdam, The Netherlands
15. Merck Healthcare KGaA, Darmstadt, Germany