Preoperative Gastric Acid Secretion and the Risk to Develop Barretts Esophagus After Esophagectomy for Chagasic Achalasia - Rocha, Julio Rafael Mariano da; Cecconello, Ivan; Ribeiro Junior, Ulysses; Baba, Elisa R.; Safatle-Ribeiro, Adriana Vaz; Iriya, Kiyoshi; Sallum, Rubens A. A.; Sakai, Paulo; Szachnowicz, Sérgio (Journal of Gastrointestinal Surgery, 2009)