39. COMPARISON OF SAFETY AND EFFECTIVENESS IN PATIENTS UNDERGOING SMILE REFRACTIVE SURGERY WITH FLAP THICKNESS OF 100 μM AND 160 μM. YHCĐ [Internet]. 2023 Aug. 23 [cited 2026 Sept. 9];64(5). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/796