Yin, Z. and Shen, B. 2022. Comparative study of the effect of U100 laser and pneumatic ballistic combined with percutaneous transhepatic cholangioscopic lithotomy in the treatment of intra-and extrahepatic bile duct stones and its effect on liver function. Pakistan Journal of Medical Sciences. 38, 6 (Jul. 2022). DOI:https://doi.org/10.12669/pjms.38.6.5903.