title: Prophylactic mastectomy of contralateral breast only marginally improves survival, study shows.
authors.affiliation: London.
authors.forename: Susan
authors.initials: S
authors.lastname: Mayor
mesh_terms: D001943:Breast Neoplasms / Q000401:mortality / Q000473:pathology / Q000517:prevention & control / Q000601:surgery; D005260:Female; D006801:Humans; D008017:Life Expectancy; D008408:Mastectomy / Q000401:mortality; D016609:Neoplasms, Second Primary / Q000401:mortality / Q000517:prevention & control; D018426:SEER Program; D014481:United States / Q000453:epidemiology