Ketsuwan, C., W. Kongchareonsombat, P. Sangkum, K. Kijvikai, T. Sananmuang, and C. Leenanupunth. “erioperative enal alculus actors ffecting ercutaneous ephrolithotomy utcomes”. nsight rology, ol. 40, no. 2, Nov. 2019, pp. 01-08, https://he02.tci-thaijo.org/index.php/TJU/article/view/209875.