title: A retrospective look at prospective investigations.
authors.forename: Simmons
authors.initials: S
authors.lastname: Lessell
mesh_terms: D035843:Biomedical Research / Q000592:standards*; D002986:Clinical Trials as Topic / Q000592:standards*; D006801:Humans; D009885:Ophthalmology / Q000592:standards*; D011446:Prospective Studies; D012189:Retrospective Studies