title: Breast cancer: PALOMA-2 - hope beyond the threshold.
authors.forename: Diana
authors.initials: D
authors.lastname: Romero
mesh_terms: D001943:Breast Neoplasms; D006801:Humans; D000077289:Letrozole; D010879:Piperazines; D011725:Pyridines
chemical_list: D010879:Piperazines; D011725:Pyridines; D000077289:Letrozole; C500026:palbociclib