title: Retrospective analysis: looking backward to point the way forward.
authors.forename: E Andrew
authors.initials: EA
authors.lastname: Ochroch
authors.forename: Lee A
authors.initials: LA
authors.lastname: Fleisher
mesh_terms: D000776:Anesthesiology; D015331:Cohort Studies; D006801:Humans; D016347:Medical Records Systems, Computerized; D015588:Observer Variation; D011446:Prospective Studies; D011897:Random Allocation; D012107:Research Design; D012189:Retrospective Studies