Zhang, Ruling, Li Cheng, Xiaobo Cai, Hang Zhao, Feng Zhu, and Xinjian Wan. “Comparison of the Safety and Effectiveness of Endoscopic Biliary Decompression by Nasobiliary Catheter and Plastic Stent Placement in Acute Obstructive Cholangitis”. Swiss Medical Weekly 143, no. 2728 (June 30, 2013): w13823. Accessed April 2, 2023. https://smw.ch/index.php/smw/article/view/1707.