title: The systematic search for risk factors in multiple sclerosis.
authors: Faculty of Medicine (Neurology), University of British Columbia, Vancouver V6T 2B5, Canada.
authors: Kyla A
authors: KA
authors: McKay
authors: Faculty of Medicine (Neurology), University of British Columbia, Vancouver V6T 2B5, Canada. Electronic address: helen.tremlett@ubc.ca.
authors: Helen
authors: H
authors: Tremlett
mesh_terms: D004781:Environmental Exposure / Q000009:adverse effects*; D006801:Humans; D015201:Meta-Analysis as Topic; D009103:Multiple Sclerosis / Q000175:diagnosis* / Q000453:epidemiology*; D012196:Review Literature as Topic