1. Physician and former student of Santa Marcelina College, Department of General Surgery and Coloproctology Service, Hospital Santa Marcelina, São Paulo, SP, Brazil
2. Physician specialist in Coloproctology and professor at Santa Marcelina College, Department of General Surgery and Coloproctology Service, Hospital Santa Marcelina, São Paulo, SP, Brazil
3. Physician specialist in Coloproctology, professor at Santa Marcelina College and head of the Department of General Surgery, Department of General Surgery and Coloproctology Service, Hospital Santa Marcelina, São Paulo, SP, Brazil