summary: This Canadian study found that over the last 50 years a greater proportion of females than males have been developing MS and hypothesize that this is due to environmental factors, which if identified, could be addressed.

authors: Orton SM, Herrera BM, Yee IM, Valdar W, Ramagopalan SV, Sadovnick AD, Ebers GC; for the Canadian Collaborative Study Group.

source: Lancet Neurol. 2006 Nov;5(11):932-6.

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category: Epidemiology

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