[1] Grp Oncolin Florianopolis, Med Oncol Unit, Florianopolis, SC, Brazil
[2] Ctr Pesquisas Oncol CEPON, Med Oncol Dept, Florianopolis, SC, Brazil
[3] AC Camargo Canc, Postgrad Program, Sao Paulo, SP, Brazil
[4] Ctr Paulista Oncol, Med Oncol Unit, Grp Oncoclin, Sao Paulo, SP, Brazil
[5] AC Camargo Canc, Dept Abdominal Surg, Sao Paulo, SP, Brazil
[6] Hosp Base Dist Fed, Surg Oncol Unit, Brasilia, DF, Brazil
[7] Univ Fed Juiz Fora, Oncol Unit, Juiz De Fora, MG, Brazil
[8] Ctr Oncol Parana Oncoville, Surg Oncol Unit, Curitiba, Parana, Brazil
[9] Hosp Mae Deus, Surg Oncol Unit, Porto Alegre, RS, Brazil
[10] Hosp Moinho Vento, Dept Med Oncol, Porto Alegre, RS, Brazil
[11] Grp Oncoclin Porto Alegre, Porto Alegre, RS, Brazil
[12] AC Camargo Canc, Dept Med Oncol, Sao Paulo, SP, Brazil
[13] Ctr Florianopolis, Med Oncol Unit, Grp Oncoclin Florianopolis, CEP, Rua St Dumont 182, 4 andar, BR-88015020 Florianopolis, Brazil