1. Immunology and Neurology Service; Multiple Sclerosis Unit, Ramón y Cajal University Hospital; Madrid Spain
2. Multiple Sclerosis Unit; La Fe University and Polytechnic Hospital; Valencia Spain
3. Experimental Therapeutics Program, Montreal Neurological Institute and Hospital, McGill University; Montreal Quebec Canada
4. Neurological/Neuroimmunological Service; Multiple Sclerosis Center of Catalonia, Vall d'Hebron University Hospital; Barcelona Spain
5. Neuroimmunology Unit; Montreal Neurological Institute and Hospital, McGill University; Montreal Quebec Canada
6. F. Hoffman-La Roche; Basel Switzerland
7. Neurology Service; Gregorio Marañón University Hospital; Madrid Spain
8. Neurology Service; Virgen Macarena University Hospital; Seville Spain
9. Neurology Service; Health Research Institute of the San Carlos Clinical University Hospital; Madrid Spain
10. Genetics and Biotechnology Program; Department of Molecular Biology; Istanbul Technical University; Istanbul Turkey
11. Center for Molecular Medicine; Pavlov State Medical University; St Petersburg Russia
12. Neurology Service; Regional University Hospital of Málaga; Málaga Spain
13. Neurology Service; Clinical University Hospital; Valencia Spain
14. Department of Neurology; Cerrahpaşa School of Medicine, Istanbul University; Istanbul Turkey
15. St Petersburg Center for Multiple Sclerosis and Autoimmune Diseases; City Hospital; St Petersburg Russia
16. Department of Medicine; University of Alcalá de Henares; Madrid Spain