Zhang J, Xiao N, Huang K, Xu F, Pan G, Bo G. Effect of percutaneous nephrolithotripsy under guidance of B-ultrasound for the treatment of complex renal calculi. J Pak Med Assoc [Internet]. 2022 Feb. 21 [cited 2025 May 19];72(6):1198-200. Available from: https://jpma.org.pk/index.php/public_html/article/view/3295