How safe is ERCP to the endoscopist? - Cohen, R V; Aldred, Martha Aurélia; Paes, Walter Siqueira; Fausto, Agnes Maria da Fonseca; Nucci, José Roberto; Yoshimura, Elisabeth Mateus; Okuno, Emico; Garcia, Marcelo Engracia; Maruta, Luis Masuo; Tolosa, Erasmo Magalhães Castro de (Surgical Endoscopy, 1997)