Mortality associated with oral contraceptive use. Confounding might have accounted for results.
Szarewski
A
A
Kitchener
H C
HC
D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D012306:Risk; D002583:Uterine Cervical Neoplasms / Q000401:mortality*
D003276:Contraceptives, Oral