title: The number of negative nodes as a prognostic factor in breast cancer: a difficult concept to defend.
authors.forename: N S
authors.initials: NS
authors.lastname: Ivanovic
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008198:Lymph Nodes / Q000473:pathology*; D011379:Prognosis; D016019:Survival Analysis