IMPACT OF FRONTAL RECESS CROWDING BY OLFACTORY FOSSA DEPTH AND AGGER NASI CELLS ON THE DEGREE OF FRONTAL SINUS OPACIFICATION ON COMPUTED TOMOGRAPHY. YHCĐ [Internet]. 2026 July 31 [cited 2026 Sept. 8];67(CĐ11-NCKH). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/6025