title: Authors reply.
authors.affiliation: Department of Radiation Oncology, University of Florence, Florence, Italy. Electronic address: icro.meattini@unifi.it.
authors.forename: Icro
authors.initials: I
authors.lastname: Meattini
authors.affiliation: Molecular and Nutritional Epidemiology Unit, ISPO (Cancer Research and Prevention Institute), Florence, Italy.
authors.forename: Calogero
authors.initials: C
authors.lastname: Saieva
authors.affiliation: Department of Radiation Oncology, University of Florence, Florence, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Livi
mesh_terms: D001940:Breast / Q000528:radiation effects*; D001943:Breast Neoplasms / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D050397:Radiotherapy, Intensity-Modulated