Transpapillary biliary drainage using a forward-viewing endoscope for patients with distal malignant biliary obstruction and type I duodenal stenosis - Yuichi Hirata; Kazuhiro Iida; Kei Takahashi; Mariko Hatada; Kana Miyara; Yuichiro Aoyama; Ryosuke Mizukami; Takahiro Oribe; Mizuka Yonezawa; Daisuke Orita; Ryutaro Yoshida; Michitaka Kouhashi; et al. (Endoscopy International Open)