Sakai Y, Iwai T, Shimura K, Gon K, Koizumi K, Ijima M, Chiba K, Nakatani S, Sugiyama H, Tsuyuguchi T, Kamisawa T, Maetani I, Kida M. Safety and efficacy of metallic stent for unresectable distal malignant biliary obstruction in elderly patients. World J Gastroenterol 2018; 24(1): 69-75 [PMID: 29358883 DOI: 10.3748/wjg.v24.i1.69]