“IMPROVED SAPHENOUS VEIN–PRESERVING ENDOVENOUS LASER ABLATION TECHNIQUE IN THE TREATMENT OF CHRONIC SUPERFICIAL VENOUS INSUFFICIENCY OF THE LOWER EXTREMITIES”. Vietnam Journal of Community Medicine, vol. 67, no. English Version No 1, 2026, June 2026, https://doi.org/10.52163/yhc.v67iE1.5283.