The case control study: the problem and the prospect.
D003430:Cross-Sectional Studies; D004812:Epidemiologic Methods; D004813:Epidemiology / Q000592:standards; D011640:Public Policy; D011643:Publishing; D011897:Random Allocation; D012107:Research Design; D012189:Retrospective Studies; D013223:Statistics as Topic; D009626:Terminology as Topic