Cholangioscopy-guided guidewire insertion into the gallbladder using a novel thin cholangioscope under balloon enteroscopy in a patient with Roux-en-Y gastrectomy - Tanisaka, Yuki; Ryozawa, Shomei; Mizuide, Masafumi; Fujita, Akashi; Watanabe, Ryuichi; Hamamura, Ryosuke (Endoscopy, 2025)