Electrohydraulic lithotripsy under the mother-baby cholangioscope system using a colonoscope for large common bile duct stones in a patient with Roux-en-Y reconstruction - Ryuichi Tezuka, MD; Mitsuru Okuno, PhD, MD; Tsuyoshi Mukai, PhD, MD; Shota Iwata, MD; Eiichi Tomita, PhD, MD (VideoGIE, 2021)