Successful removal of impacted large bile duct stones using electrohydraulic lithotripsy with an ultraslim endoscope after Billroth II gastrectomy - Matsumoto, Kazuyuki; Kato, Hironari; Horiguchi, Shigeru; Uchida, Daisuke; Tomoda, Takeshi; Muro, Shinichiro; Okada, Hiroyuki (Endoscopy, 2019)