“CHRONIC FRONTAL SINUSITIS CAUSED BY FUNGAL BALL ASSOCIATED WITH CHRONIC INVASIVE FUNGAL RHINOSINUSITIS: A RARE CASE REPORT AND LITERATURE REVIEW”. Vietnam Journal of Community Medicine 67, no. 6 (June 25, 2026). Accessed September 8, 2026. https://tapchiyhcd.vn/index.php/yhcd/article/view/5510.