Novel J-tip guidewire for reintervention after stent-by-stent placement in patients with malignant hilar biliary obstruction - Tadahisa Inoue; Mayu Ibusuki; Rena Kitano; Kazumasa Sakamoto; Satoshi Kimoto; Yuji Kobayashi; Yoshio Sumida; Yukiomi Nakade; Kiyoaki Ito; Masashi Yoneda (Endoscopy International Open, 2022)