EVALUATING FRONTAL SINUS OPACIFICATION SEVERITY USING THE LUND-MACKAY SCORE BASED ON ANATOMICAL VARIANTS OF POSTERIOR FRONTAL RECESS CELLS THROUGH IMAGING ANALYSIS. YHCĐ [Internet]. 2026 June 2 [cited 2026 Sept. 8];67(English Version No 1, 2026). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/5248