Clinical research in obstetrics and gynecology: a Baedeker for busy clinicians.
Grimes
David A
DA
Family Health International, Research Triangle Park, North Carolina 27709, USA. dgrimes@fhi.org
Schulz
Kenneth F
KF
D016362:Analgesia, Obstetrical; D015982:Bias; D016022:Case-Control Studies; D015331:Cohort Studies; D016001:Confidence Intervals; D015986:Confounding Factors, Epidemiologic; D004812:Epidemiologic Methods; D006176:Gynecology; D016017:Odds Ratio; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D016896:Treatment Outcome