1. Department of Neurology, Royal Melbourne Hospital, Parkville, 3050, Australia,
2. Department of Neurology, Sheba Medical Center, Ramat Gan, 52621 Israel
3. Department of Neurology, Hospital Italiano, Buenos Aires, 1425, Argentina
4. Department of Neurology, Charles LeMoyne Hospital, Québec, J4V 2J2, Canada
5. Department of Neurology, Royal Melbourne Hospital, Parkville, 3050, Australia
6. Servicio de Neurología, Hospital Virgen de la Macarena, Sevilla, 41071, Spain
7. University of Health Services Research, Monash Medical Centre, Clayton, 3168, Australia
8. Neurologische Klinik, Universitätsspital, Basel, 4000, Switzerland
9. Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
10. Department of Neurology, Hospitalstr. 6, Asbach, 53567, Germany
11. Baylor Multiple Sclerosis Center, The Methodist Hospital, Houston, TX 77030, USA
12. Department of Neurological and Psychiatric Sciences, University of Bari, Bari, 70122, Italy
13. Department of Neurology, Groene Hart Ziekenhuis, Gouda, 2800, The Netherlands
14. Serono Symposia International Foundation, Rome, 00176, Italy