title: Understanding clinical study design.
authors.affiliation: University of Wisconsin Medical School Department of Medicine, USA.
authors.forename: C
authors.initials: C
authors.lastname: Seibert
authors.forename: L
authors.initials: L
authors.lastname: Zakowski
mesh_terms: D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D019317:Evidence-Based Medicine; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design