Department of Digestive Surgery, University of São Paulo School of Medicine, São Paulo-SP 05403-000, Brazil;
Department of Digestive Surgery, University of São Paulo School of Medicine, São Paulo-SP 05403-000, Brazil;
Department of Digestive Surgery, University of São Paulo School of Medicine, São Paulo-SP 05403-000, Brazil;
Department of Digestive Surgery, University of São Paulo School of Medicine, São Paulo-SP 05403-000, Brazil;
Department of Digestive Surgery, University of São Paulo School of Medicine, São Paulo-SP 05403-000, Brazil;