1. Professor, Department of Surgery, School of Medicine of the Federal University of Ceará, Fortaleza, Ceará, Brazil
2. Staff of Colorectal Unit, School of Medicine of the Federal University of Ceará, Fortaleza, Ceará, Brazil
3. Staff of Colorectal Unit, Gastroenterology and Coloproctology of Ceará, Fortaleza, Ceará, Brazil