1. Department of Coloproctology, Hospital Moinhos de Vento, Porto Alegre, RS, Brazil
2. Division of Coloproctology, Medical School, Universidade Feevale, Novo Hamburgo, RS, Brazil
3. Department of Coloproctology, Hospital de Clínicas de Passo Fundo, ATITUS Educação, Passo Fundo, RS, Brazil
4. Division of Clinical Medicine, Medical School, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
5. Division of Clinical Surgery, Medical School, Pontifícia Universidade Católica de Campinas, Campinas, SP, Brazil
6. Inflammatory Bowel Disease Outpatient Clinic, Hospital Universitário São Francisco de Assis, Bragança Paulista, SP, Brazil
7. Inflammatory Bowel Disease Group, Hospital Santa Catarina, São Paulo, SP, Brazil
8. Division of Digestive System Surgery, Medical School, Universidade Estadual Paulista, Botucatu, SP, Brazil