title: Superiority of letrozole over tamoxifen in the first-line treatment of metastatic breast cancer patients with normal serum Her-2/neu levels: question of tamoxifen resistance.
authors.forename: Kadri
authors.initials: K
authors.lastname: Altundag
authors.forename: Ozden
authors.initials: O
authors.lastname: Altundag
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D047072:Aromatase Inhibitors; D001943:Breast Neoplasms / Q000097:blood / Q000188:drug therapy*; D018572:Disease-Free Survival; D004965:Estrogen Antagonists / Q000627:therapeutic use; D005260:Female; D006801:Humans; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local / Q000097:blood / Q000188:drug therapy*; D009367:Neoplasm Staging; D009376:Neoplasms, Hormone-Dependent / Q000097:blood / Q000188:drug therapy*; D009570:Nitriles / Q000627:therapeutic use*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000097:blood; D013629:Tamoxifen / Q000627:therapeutic use; D014230:Triazoles / Q000627:therapeutic use*
chemical_list: D000970:Antineoplastic Agents; D047072:Aromatase Inhibitors; D004965:Estrogen Antagonists; D009570:Nitriles; D018719:Erb-b2 Receptor Tyrosine Kinases; D013629:Tamoxifen; D014230:Triazoles