title: Method to test whether late extended letrozole, rather than self- selection, improves the outcome in patients with breast cancer who have completed 5 years of tamoxifen.
authors.forename: Jayant S
authors.initials: JS
authors.lastname: Vaidya
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000009:adverse effects; D001943:Breast Neoplasms / Q000188:drug therapy*; D017024:Chemotherapy, Adjuvant; D018572:Disease-Free Survival; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D000077289:Letrozole; D008875:Middle Aged; D009376:Neoplasms, Hormone-Dependent / Q000188:drug therapy*; D009570:Nitriles / Q000008:administration & dosage* / Q000009:adverse effects; D010919:Placebos; D017698:Postmenopause; D015996:Survival Rate; D013629:Tamoxifen / Q000008:administration & dosage*; D016896:Treatment Outcome; D014230:Triazoles / Q000008:administration & dosage* / Q000009:adverse effects
chemical_list: D000970:Antineoplastic Agents; D009570:Nitriles; D010919:Placebos; D014230:Triazoles; D013629:Tamoxifen; D000077289:Letrozole