[1] Hosp Sao Jose Beneficencia Portuguesa Sao Paulo, Sao Paulo, Brazil
[2] Pontifical Univ Catholic RS, Sch Med, Porto Alegre, RS, Brazil
[3] Bristol Myers Squibb SA, Sao Paulo, Brazil
[4] Inst Canc Mae Deus, Porto Alegre, RS, Brazil
[5] Univille Univ Regiao Joinville, Joinville, Brazil
[6] Hosp Canc Barretos, Barretos, Brazil
[7] Oncoville, Curitiba, Parana, Brazil
[8] CEPON, Florianopolis, SC, Brazil
[9] Hosp Sirio Libanes, Sao Paulo, Brazil
[10] Oxford Outcomes, Vancouver, BC, Canada
[11] Bristol Myers Squibb Co, Sao Paulo, Brazil
[12] Bristol Myers Squibb Co, Wallingford, CT 06492 USA