title: Early oral contraceptive use and breast cancer risk.
authors.forename: K
authors.initials: K
authors.lastname: McPherson
authors.forename: P A
authors.initials: PA
authors.lastname: Coope
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000139:chemically induced*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D012306:Risk; D012984:Software; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral