Recanalization of an obstructive pancreaticojejunal anastomosis with direct visualization by using antegrade peroral pancreatoscopy - Kawakami, Yujiro; Koshita, Shinsuke; Kanno, Yoshihide; Ogawa, Takahisa; Murabayashi, Toji; Nakase, Hiroshi; Ito, Kei (Endoscopy, 2020)