Chen, Peng, Bing Liu, and Hui Sun. “Clinical Efficacy of Recombinant Human Basic Fibroblast Growth Factor Combined With Ranitidine in the Treatment of Recurrent Oral Ulcer and Its Effect on Serum TNF, IL-2 and T-Lymphocyte Subsets”. Pakistan Journal of Medical Sciences 40, no. 4 (February 6, 2024). Accessed April 23, 2024. https://pjms.org.pk/index.php/pjms/article/view/7881.