The natural history of secondary progressive multiple sclerosis: observations from the London study group.
Rice
G P A
GP
University Hospital, Multiple Sclerosis Clinic, London, Ontario, Canada.
D002986:Clinical Trials as Topic; D018450:Disease Progression; D005500:Follow-Up Studies; D006801:Humans; D008131:London; D020528:Multiple Sclerosis, Chronic Progressive / Q000503:physiopathology; D011379:Prognosis; D013997:Time Factors