1. Departament of Coloproctology of Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil
2. Departament of Surgery, Service of Coloproctology, Faculdade de Ciências Médicas, UNICAMP, Campinas, SP, Brazil
3. Brazilian Society of Coloproctology (SBCP), Rio de Janeiro, RJ, Brazil
4. Hospital Estadual de Sumaré, Sumaré, SP, Brazil