Successful biliary drainage with peroral direct cholangioscopy in a patient with Roux-en-Y hepaticojejunostomy for congenital biliary dilatation - Matsumoto, Kazuyuki; Tsutsumi, Koichiro; Baba, Yuki; Takemoto, Koji; Tsugeno, Hirofumi; Fujiki, Shigeatsu; Okada, Hiroyuki (Endoscopy, 2015)