[1] IMO, Bariatr Surg, Belo Horizonte, MG, Brazil
[2] Fac Ciencias Med Minas Gerais, Cirurgia, Belo Horizonte, MG, Brazil
[3] Hosp Clin Sao Paulo, Fac Med Sao Paulo, Endoscopy Unit, Sao Paulo, SP, Brazil
[4] Endovita Inst, Endoscopy Unit, Sao Paulo, SP, Brazil
[5] Brigham & Women Hosp, Gastroenterol Hepatol & Endoscopy Dept, Boston, MA USA
[6] Florida Int Univ, Endoscopy Unit, Miami, FL 33199 USA