Lee, Hsu-Lin, et al. “Efficacy of Tegafur-Uracil Maintenance Therapy in Non-Metastatic Head and Neck Squamous Cell Carcinoma: A Meta-Analysis With Trial Sequential Analysis”. World Journal of Oncology, vol. 16, no. 6, Oct. 2025, pp. 609-20, https://doi.org/10.14740/wjon2639.