title: The four seasons of multiple sclerosis.
authors.forename: Anne H
authors.initials: AH
authors.lastname: Cross
authors.forename: Becky Jo
authors.initials: BJ
authors.lastname: Parks
mesh_terms: D001130:Arizona / Q000453:epidemiology; D001900:Boston / Q000453:epidemiology; D004777:Environment; D006801:Humans; D008279:Magnetic Resonance Imaging; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000175:diagnosis / Q000453:epidemiology* / Q000473:pathology; D009820:Ohio / Q000453:epidemiology; D012189:Retrospective Studies; D012621:Seasons; D014887:Weather