title: [Studies on case-control in the framework of research on oral contraceptive side effects].
authors.forename: J
authors.initials: J
authors.lastname: Annus
mesh_terms: D001695:Biology; D003362:Cost-Benefit Analysis; D003625:Data Collection; D004812:Epidemiologic Methods; D005069:Evaluation Studies as Topic; D011446:Prospective Studies; D012106:Research; D012107:Research Design; D012189:Retrospective Studies; D012307:Risk Factors
keywords: Biology; Control Groups; Cost Benefit Analysis; Data Collection; Epidemiologic Methods; Evaluation; Prospective Studies; Quantitative Evaluation; Research Methodology; Retrospective Studies; Risk Factors; Studies