1. Graduate Program in Health Sciences of Universidade São Francisco (USF), Bragança Paulista, SP, Brazil
2. Discipline of Digestive System Surgery of Faculdade de Medicina da Fundação ABC (FUABC), Santo André, SP, Brazil
3. School of Medicine, USF, Bragança Paulista, SP, Brazil
4. Discipline of Digestive System Surgery of Universidade Nove de Julho (UNIVOVE), São Paulo, SP, Brazil