title: Retrospective subset analyses in early breast cancer revisited.
authors.forename: Miguel
authors.initials: M
authors.lastname: Martin
authors.forename: Parham
authors.initials: P
authors.lastname: Khosravi
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D017024:Chemotherapy, Adjuvant; D005260:Female; D006801:Humans; D012189:Retrospective Studies