[1] Inst Nacl Enfermedades Neoplas, Lima, Peru
[2] Inst Brasileiro Controle Canc, Sao Paulo, Brazil
[3] Univ Sao Paulo, Inst Canc Estado Sao Paulo, Sao Paulo, Brazil
[4] Inst Nacl Canc Brasil, Rio De Janeiro, Brazil
[5] Fundacao Doutor Amaral Carvalho, Jau, Brazil
[6] Fac Med ABC, Santo Andre, Brazil
[7] Ctr Pesquisas Oncol Santa Catarina, Florianopolis, SC, Brazil
[8] Hosp AC Camargo Fund Antonio Prudente, Sao Paulo, Brazil
[9] Ctr Oncol Rosario, Rosario, Argentina
[10] Clin Amo, Salvador, BA, Brazil
[11] Invest Clin Ciudad Buenos Aires, Buenos Aires, DF, Argentina
[12] Fdn Ctr Oncol Integrac Reg, Mendoza, Argentina
[13] Ctr San Roque, San Miguel De Tucuman, Argentina
[14] ISIS Clin Especializada, Santa Fe, Santa Fe, Argentina
[15] CER Inst Med, Buenos Aires, DF, Argentina
[16] Latin Amer Cooperat Oncol Grp LACOG, Porto Alegre, RS, Brazil
[17] Hosp Sao Lucas, PUCRS Sch Med, Porto Alegre, RS, Brazil