13Th Annual Meeting of the Amer-Comm-For-Treatment-And-Res-In-Multiple-Sclerosis/24Th Congress of the European-Comm-For-Treatment-And-Res-In-Multiple-Sclerosis/5Th Congress of the Latin-Amer-Comm-For-Treatment-And-Res-In-Multiple-Sclerosis, Date: SEP 17-20, 2008, Location: Montreal, CANADA, Patrocinadores: Amer Comm Treatment & Res Multiple Scleros, European Comm Treatment & Res Multiple Scleros, Latin Amer Comm Treatment & Res Multiple Scleros