1. Department of Coloproctology and Gastroenterology, Hospital de Clínicas de Passo Fundo (HCPF), Passo Fundo, RS, Brazil.
2. School of Medicine, ATITUS Educação, Passo Fundo, RS, Brazil.
3. Department of Gastroenterology, Endoclin Diagnostic Center, Passo Fundo, RS, Brazil.