title: [Prolonged or early use of oral contraceptives--which one is the greatest risk for the development of breast cancer?].
authors.forename: H
authors.initials: H
authors.lastname: Olsson
authors.forename: T R
authors.initials: TR
authors.lastname: Möller
authors.forename: J
authors.initials: J
authors.lastname: Ranstam
mesh_terms: D000367:Age Factors; D001943:Breast Neoplasms / Q000139:chemically induced*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D012307:Risk Factors; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral
vernacular_title: Långtidsbruk eller tidig användning av p-piller--vilket har störst samband med bröstcancerrisken?