Affiliation: | 1. Angelita and Joaquim Gama Institute, , Sao Paulo, Brazil;2. Department of Gastroenterology – Colorectal Surgery Division, University of Sao Paulo School of Medicine, , Sao Paulo, Brazil;3. Department of Radiology – Nuclear Medicine Division, University of S?o Paulo School of Medicine, , Sao Paulo, Brazil;4. Department of Radiology and Nuclear Medicine, Hospital do Cora??o, , Sao Paulo, Brazil |