title: Observational studies: what is a cohort study?
authors.affiliation: University of Ottawa Center for Transfusion Research, Clinical Epidemiology Program, Ottawa Health Research Institute & Ottawa Hospital, Ottawa, Ontario, Canada.
authors.forename: Jason
authors.initials: J
authors.lastname: Tay
authors.forename: Alan
authors.initials: A
authors.lastname: Tinmouth
mesh_terms: D002985:Clinical Protocols; D015331:Cohort Studies; D006801:Humans; D011446:Prospective Studies; D012107:Research Design; D012189:Retrospective Studies