[1] Univ Cattolica Sacro Cuore, Dept Surg, Rome, Italy
[2] Ente Osped Cantonale, Breast Unit Southern Switzerland, Viganello, Switzerland
[3] Ente Osped Cantonale, Oncol Inst Southern Switzerland, Bellinzona, Switzerland
[4] Geneva Canc Registry, Canc Registry, Geneva, Switzerland
[5] Ticino Canc Registry, Canc Registry, Locarno, Switzerland
[6] Univ Hosp Basel, Dept Gynaecol, Basel, Switzerland