Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KAFFES AJ,"A prospective, randomized, placebo-controlled trial of transdermal glyceryl trinitrate in ERCP : Effects on technical success and post-ERCP pancreatitis",Gastrointest. Endosc.,,,2006,64,,351-357,https://cir.nii.ac.jp/crid/1571417125856643456,