Reply to Dr. Köker

• References

• 1 Isayama H, Komatsu Y, Tsujino T et al. A prospective randomised study of “covered” versus “uncovered” diamond stents for the management of distal malignant biliary obstruction. Gut 2004; 53: 729-734
• 2 Petersen BT, Kahaleh M, Kozarek RA et al. A multicenter, prospective study of a new fully covered expandable metal biliary stent for the palliative treatment of malignant bile duct obstruction. Gastroenterol Res Pract 2013; 2013: 642428
• 3 Lee JH, Krishna SG, Singh A et al. Comparison of the utility of covered metal stents versus uncovered metal stents in the management of malignant biliary strictures in 749 patients. Gastrointest Endosc 2013; 78: 312-324
• 4 Ung K-A, Stotzer P-O, Nilsson Å et al. Covered and uncovered self-expandable metallic Hanarostents are equally efficacious in the drainage of extrahepatic malignant strictures. Results of a double-blind randomized study. Scand J Gastroenterol 2013; 48: 459-465
• 5 Almadi MA, Barkun AN, Martel M. No benefit of covered vs uncovered self-expandable metal stents in patients with malignant distal biliary obstruction: a meta-analysis. Clin Gastroenterol Hepatol 2013; 11: 27-37. e21