Factors Affecting Clinical Course of Postoperative Bile Leakage and Efficacy of Endoscopic Biliary Drainage: A Multi-Center Retrospective Cohort Study. - Shimojo K; Iwashita T; Iwata K; Utakata Y; Koide K; Koizumi T; Ito Y; Ohashi Y; Iwata S; Senju A; Tezuka R; Ichikawa H; et al. (DEN open, 2025)