OUTCOMES OF FLEXIBLE URETEROSCOPIC LASER LITHOTRIPSY FOR UPPER URETERAL STONES AT VIET TIEP FRIENDSHIP HOSPITAL FACILITY NO. 2. YHCĐ. 2026;67(CĐ7-Trường ĐH Y Dược Hải Phòng). doi:10.52163/yhc.v67iCD7.5611