Severe peritonitis after successful endoscopic ultrasound-guided gallbladder drainage for acute gangrenous cholecystitis - Murabayashi, Toji; Kanno, Yoshihide; Ito, Kei; Koshita, Shinsuke; Ogawa, Takahisa; Oikawa, Masaya; Noda, Yutaka (Endoscopy, 2018)