Surgery alone achieves comparable survival to adjuvant therapy in T4aN0M0 gingival squamous cell carcinoma with clear surgical margins: A registry-based propensity-matched analysis. - Tsai YT; Wen YW; Kang CJ; Lin CY; Ng SH; Ch'ang HJ; Lou PJ; Wang CP; Lin JC; Hua CH; Lee SR; Fan KH; et al. (Oral oncology, 2026)