aUOC Chirurgia Senologica Forlì-Ravenna, AUSL Romagna, Forlì, Italy

bDivision of Breast Surgery, Candiolo Cancer Institute, IRCCS, Candiolo, Italy

cDivision of Breast Surgery, IEO, European Institute of Oncology, IRCCS, Milan, Italy

dDepartment of Oncology and Hemato-Oncology, University of Milan, Milan, Italy

eEuropean Cancer Prevention Organization (ECP), Milan, Italy

Correspondence to Giovanni Corso, MD, PhD European Institute of Oncology (IEO), IRCCS, via Ripamonti 435, Milan 20141, Italy. Tel: +39 02 94375161; e-mail: [email protected]