Sampaio José Artur, Waechter Fábio Luiz, Pereira-Lima Júlio, Fossati Marco Antonio Medeiros, Felicetti José Carlos, Thiesen Victor Luiz Possebon, Rostirolla Renata Andreoli, Marques Daniela Lemos, Hornos Alexander Porley, Pereira-Lima Luiz
Departments of Surgery and Gastroenterology, Hospital Moinhos de Vento, Porto Alegre, Brazil.
Gastrointest Endosc. 2003 Sep;58(3):453-6. doi: 10.1067/s0016-5107(03)00030-0.