Endoscopic retrieval of a migrated surgical clip in a choledochojejunal anastomosis using the rendezvous technique - Ito, Takashi; Shimatani, Masaaki; Masuda, Masataka; Nakamaru, Koh; Mitsuyama, Toshiyuki; Takaoka, Makoto; Naganuma, Makoto (Endoscopy, 2021)