Luiza L Ramos1, Ravi C Marques2, Hugo G Guedes3. 1. Federal University of Santa Catarina, Araranguá, SC, 88906-072, Brazil. 2. Division of Gastrointestinal Endoscopy, Hospital Santa Luzia, Rede D'or, Brasília, DF, 70390-903, Brazil. 3. Division of Gastrointestinal Endoscopy, Hospital Santa Luzia, Rede D'or, Brasília, DF, 70390-903, Brazil. hugogguedes@yahoo.com.br.