Affiliation: | (1) Department of Surgery, Escola Paulista de Medicina, Federal University of S?o Paulo, S?o Paulo, Brazil;(2) Department of Surgery, University of Chicago, Chicago, IL 60637, USA;(3) Division of Esophagus and Stomach, Hospital Sao Paulo, Surgical Gastroenterology, Rua Diogo de Faria 1087 cj 301, Sao Paulo, SP, 04037-003, Brazil |