title: Breast cancer prevention.
authors.forename: Ray
authors.initials: R
authors.lastname: O'Connor
mesh_terms: D000284:Administration, Oral; D001943:Breast Neoplasms / Q000139:chemically induced* / Q000517:prevention & control; D003270:Contraceptive Agents / Q000009:adverse effects*; D006801:Humans; D012307:Risk Factors
chemical_list: D003270:Contraceptive Agents