Xue, Shao-wei, Ming-bo Zhang, Yu-kun Luo, Nan Li, and Shang-yi Shi. 2022. “A Comparative Study of Ultrasound-Guided Percutaneous Nephrolithotripsy and X-Ray-Guided Percutaneous Nephrolithotripsy in the Treatment of Complex Renal Calculi Without Hydronephrosis”. Pakistan Journal of Medical Sciences 38 (8). https://doi.org/10.12669/pjms.38.8.5904.