title: Letrozole or tamoxifen in early breast cancer.
authors.forename: John K
authors.initials: JK
authors.lastname: Erban
mesh_terms: D018931:Antineoplastic Agents, Hormonal / Q000009:adverse effects / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D002318:Cardiovascular Diseases / Q000139:chemically induced; D017024:Chemotherapy, Adjuvant; D006801:Humans; D000077289:Letrozole; D008207:Lymphatic Metastasis; D009570:Nitriles / Q000009:adverse effects / Q000627:therapeutic use*; D055502:Secondary Prevention; D013629:Tamoxifen / Q000627:therapeutic use*; D014230:Triazoles / Q000009:adverse effects / Q000627:therapeutic use*
chemical_list: D018931:Antineoplastic Agents, Hormonal; D009570:Nitriles; D014230:Triazoles; D013629:Tamoxifen; D000077289:Letrozole