PD-L1 upregulation and tumour progression in conjunction with lncRNA UCA1 about oral squamous cell carcinoma. A systematic review. Student’s Journal of Health Research Africa, Africa, v. 6, n. 12, p. 6, 2025. DOI: 10.51168/sjhrafrica.v6i12.2200. Disponível em: https://www.sjhrafrica.org.sjhresearchafrica.org/index.php/public-html/article/view/2200. Acesso em: 25 jul. 2026.