Two-step endoscopic ultrasound-guided drainage of an isolated posterior bile duct because of an enlarged gallbladder - Sato, Junya; Ishiwatari, Hirotoshi; Satoh, Tatsunori; Fujie, Shinya; Kaneko, Junichi; Matsubayashi, Hiroyuki; Ono, Hiroyuki (Endoscopy, 2019)