[1] Montefiore Med Ctr, Dept Surg, 111 E 210th St, Bronx, NY 10467 USA
[2] Oswaldo Cruz Univ Hosp, Dept Surg, Recife, PE, Brazil
[3] Univ Catolica Pernambuco, Recife, PE, Brazil
[4] Pernambuco Hlth Coll, Recife, PE, Brazil
[5] Univ Pernambuco, Oswaldo Cruz Univ Hosp, Recife, PE, Brazil
[6] Univ Pernambuco, Pernambuco Inst Liver, Oswaldo Cruz Univ Hosp, Recife, PE, Brazil