1. Danish Multiple Sclerosis Center; Department of Neurology; Rigshospitalet; University of Copenhagen; Copenhagen Denmark
2. Department of Neurology; Sahlgrenska University Hospital; Gothenburg Sweden
3. Department of Neurology; University Central Hospital; Helsinki Finland
4. Service de Neurologie; Hôpital Henri Mondor; Université Paris Est Créteil; Créteil France
5. Department of Neurology; Oslo University Hospital; Oslo Norway
6. Service de Neurologie; Département des Neurosciences Cliniques; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland
7. Department of Neurology; Glostrup Esbjerg, Sonderborg, and Vejle, and University of Copenhagen; Copenhagen Denmark
8. Department of Neurology; Esbjerg Hospital; Sonderborg Hospital; Vejle Hospital; Odense Denmark
9. Department of Neurology; Aalborg Hospital; Aalborg Denmark
10. Danish Research Centre for Magnetic Resonance; Centre for Functional and Diagnostic Imaging and Research; Hvidovre Hospital; University of Copenhagen; Copenhagen Denmark
11. Department of Neurology; HUS Hyvinkään Hospital; Hyvinkää Finland
12. Merck Serono Global Medical Affairs; Merck GmbH; Vienna Austria