Treatment of afferent loop syndrome using digital cholangioscopy through the percutaneous transhepatic biliary drainage route - Hakuta, Ryunosuke; Kogure, Hirofumi; Nakai, Yousuke; Sato, Tatsuya; Takahara, Naminatsu; Mizuno, Suguru; Koike, Kazuhiko (Endoscopy, 2020)