Comparison between loop-tip guidewire-assisted and conventional endoscopic cannulation in high risk patients.

Masci, E; Mangiavillano, B; Luigiano, C; Bizzotto, A; Limido, E; Cantù, P; Manes, G; Viaggi, P; Spinzi, G; Radaelli, F; Mariani, A; Virgilio, C; Alibrandi, A; Testoni, PIER ALBERTO