Institution: | 1. Division of Colorectal Surgery, Alfa Institute of Gastroenterology at University Hospital, Belo Horizonte, Brazil;2. Department of Surgery, Federal University of Minas Gerais Medical School, Belo Horizonte, Brazil;3. Division of Surgical Pathology, Alfa Institute of Gastroenterology at University Hospital, Belo Horizonte, Brazil;4. Department of Pathology, Federal University of Minas Gerais Medical School, Belo Horizonte, Brazil |