1. Laboratory of Immunopathology Keizo Asami; Federal University of Pernambuco; Recife Brazil
2. Laboratory of Immunopathology Keizo Asami and Department of Genetics; Federal University of Pernambuco; Recife Brazil
3. Master in Pathology; Federal University of Pernambuco; Recife Brazil
4. Department of Gastroenterology; University Hospital; Federal University of Pernambuco; Recife Brazil
5. Maurílio Toscano de Lucena; Department of Proctology; Barão de Lucena Hospital; Recife Brazil
6. Department of Surgery; University Hospital; Federal University of Pernambuco; Recife Brazil
7. Department of Pathology; Federal University of Pernambuco; Recife Brazil