Endoscopic Technology for Diagnosis of Biliary Stricture with a Focus on Peroral Cholangioscopy: Challenges in Peroral Cholangioscopy-Based Management. - Tomishima, Ko; Isayama, Hiroyuki; Fujisawa, Toshio; Takasaki, Yusuke; Fukuma, Taito; Takahashi, Sho; Ishii, Shigeto (Korean Journal of Pancreas & Biliary Tract / Daehan Chwedamdo Haghoeji, 2026)