title: Oral contraceptives, breast cancer, and lactation.
authors.forename: S
authors.initials: S
authors.lastname: Harlap
authors.forename: E
authors.initials: E
authors.lastname: Johannisson
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000139:chemically induced* / Q000453:epidemiology; D015986:Confounding Factors, Epidemiologic; D003276:Contraceptives, Oral / Q000009:adverse effects*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008875:Middle Aged
chemical_list: D003276:Contraceptives, Oral