CLINICAL OUTCOMES OF RETROPERITONEAL LAPAROSCOPIC URETEROLITHOTOMY FOR UPPER URETERAL STONES AT NGHE AN FRIENDSHIP GENERAL HOSPITAL. YHCĐ 2026, 67 (CĐ7-Trường ĐH Y Dược Hải Phòng). https://doi.org/10.52163/yhc.v67iCD7.5623.