title: Historical cohort studies in multiple sclerosis.
authors.affiliation: Department of Public Health, University of Bergen, Norway.
authors.forename: T
authors.initials: T
authors.lastname: Riise
mesh_terms: D015331:Cohort Studies; D005069:Evaluation Studies as Topic; D006801:Humans; D008499:Medical Records; D009103:Multiple Sclerosis / Q000209:etiology*; D012042:Registries; D012107:Research Design; D012189:Retrospective Studies