On cohort effects in studies on oral contraceptive use and breast cancer.
Olsson
H
H
Ranstam
J
J
Möller
T R
TR
D001943:Breast Neoplasms / Q000139:chemically induced*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D013997:Time Factors
D003276:Contraceptives, Oral