Artifon Everson L A, Sakai Paulo, Luz Gustavo O, Furuya Carlos K, Baba Elisa R, Sakai Christiano, Safatle-Ribeiro Adriana V, Ishioka Shinichi
Gastrointestinal Endoscopy Unit, University of São Paulo Medical School, São Paulo, Brazil.
Gastrointest Endosc. 2006 May;63(6):862-3. doi: 10.1016/j.gie.2005.10.046.