title: Observational studies: how to go about them?
authors.affiliation: Department of Epidemiology and Biostatistics, McGill University, Montreal, Canada. maninder.setia@mail.mcgill.ca
authors.forename: Maninder Singh
authors.initials: MS
authors.lastname: Setia
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D004812:Epidemiologic Methods; D006801:Humans; D018579:Patient Selection