Successful endoscopic transpapillary gallbladder stenting using a new easily maneuverable guidewire: a report of two cases - Miyabe, Katsuyuki; Kato, Akihisa; Asano, Go; Hori, Yasuki; Yoshida, Michihiro; Naitoh, Itaru; Hayashi, Kazuki (Endoscopy, 2019)