Fujita N, Noda Y, Kobayashi G et al : ERCP for intradiverticular papilla: two-devices-in-one-channel method. endoscopic retrograde cholangiopancreatography. Gastrointest Endosc 48 : 517-520, 1998
Ishii T, Kin T, Katanuma A : Successful intervention using multiloop traction for cases with difficult biliary cannulation due to periampullary diverticula. Dig Endosc 33 : e111-113, 2021