1. Inter-Department Multiple Sclerosis Research Centre; Neurological Institute IRCCS Mondino; Pavia Italy
2. Unit of Biostatistics and Clinical Epidemiology; Department of Public Health; University of Pavia; Pavia Italy
3. MS Centre; Department of Neuroscience and Imaging; University ‘G. d'Annunzio’; Chieti Italy
4. Hospital Universitario Virgen Macarena; Sevilla Spain
5. Neuro Rive-Sud; Hôpital Charles LeMoyne; Quebec QC Canada
6. Hôpital Notre Dame; Montreal QC Canada
7. Al-Zahra Hospital; Isfahan University of Medical Sciences; Isfahan Iran
8. Amiri Hospital; Kuwait City Kuwait
9. Hotel-Dieu de Levis; Quebec QC Canada
10. Karadeniz Technical University; Trabzon Turkey
11. Ospedali Riuniti di Salerno; Salerno Italy
12. University Hospital Nijmegen; Nijmegen The Netherlands
13. Aarhus University Hospital; Aarhus C Denmark
14. John Hunter Hospital; Newcastle NSW Australia
15. Maaslandziekenhuis; Sittard The Netherlands
16. Department of Neurology; Box Hill Hospital; Monash University; Box Hill Vic. Australia
17. Ospedale di Macerata; Salerno Italy
18. University Hospital San Carlos; IdISSC; Madrid Spain
19. Hospital Italiano; Buenos Aires Argentina
20. Department NEUROFARBA; Section of Neurosciences; University of Florence; Florence Italy
21. Charles University; Prague Czech Republic
22. Hospital Universitario Virgen de Valme; Seville Spain
23. University of Melbourne; Melbourne Australia
24. Department of Basic Medical Sciences; Neuroscience and Sense Organs; University of Bari; Bari Italy