[1] Clin Univ Navarra, Breast Surg Oncol Unit, Madrid, Spain
[2] Leiden Univ, Med Ctr, Leidan, Netherlands
[3] Hosp Univ ValldHebron, Breast Surg Unit, Barcelona, Spain
[4] Natl Inst Oncol, Dept Breast & Sarcoma Surg, Budapest, Hungary
[5] Hosp Israeli Oncol, Breast Unit, LISOD, Kiev, Ukraine
[6] Pauls Stradins Clin Univ Hosp, Breast Unit, Riga, Latvia
[7] Riga Stradins Univ, Inst Oncol, Riga, Latvia
[8] Ctr Clin Champalimaud, Breast Unit, Lisbon, Portugal
[9] Ente Osped Cantonale, Cto Senol Svizzera Italiana, Bellinzona, Switzerland
[10] Inst Oncol Angel H Roffo, Buenos Aires, DF, Argentina
[11] Ege Univ, Izmir, Turkey
[12] Kaplan Med Ctr, Rehovot, Israel
[13] Bialostockie Ctr Onkol, Bialystok, Poland
[14] IPO Francisco Gentil, Lisbon, Portugal
[15] Ctr HospitalarUniv Sao Joao, Porto, Portugal
[16] FPO IRCCS, Candiolo Canc Inst, Turin, Italy
[17] AUSL Romagna, Rimini, Italy
[18] Sahlgrens Univ Hosp, Gothenburg, Sweden