Nguyen HM, Tran HT, Pham TM, Phan NPT. CLINICAL FEATURES OF GINGIVAL HYPERPIGMENTATION IN VIETNAMESE OUTPATIENTS. CTJUMP [Internet]. 2023 Mar. 30 [cited 2026 Sep. 11];(5):104-11. Available from: https://tapchi.ctump.edu.vn/index.php/ctump/article/view/648