R. Zhang, L. Cheng, X. Cai, H. Zhao, F. Zhu, and X. Wan, “Comparison of the safety and effectiveness of endoscopic biliary decompression by nasobiliary catheter and plastic stent placement in acute obstructive cholangitis”, Swiss Med Wkly, vol. 143, no. 2728, p. w13823, Jun. 2013.