Feasibility of a novel 5F plastic stent in endoscopic transpapillary gallbladder drainage for acute cholecystitis - Kazunari Nakahara; Yosuke Igarashi; Akihiro Sekine; Yusuke Satta; Haruka Niwa; Junya Sato; Shinjiro Kobayashi; Takehito Otsubo; Keisuke Tateishi (Endoscopy International Open)