Retrograde double-balloon endoscopy-assisted electrohydraulic lithotripsy: Effective treatment of a true-enterolith associated with Crohn’s disease - Haga, Keiichi; Shibuya, Tomoyoshi; Ikejima, Shunsuke; Nomura, Kei; Takasaki, Yusuke; Isayama, Hiroyuki; Nagahara, Akihito (Endoscopy International Open, 2023)