Alshehri , M., R. Almohsen, H. Almalki, S. Ahmadeen, A. . . Alqahtani, N. . Alhusainan, R. . . AlMouh, W. AlNowaisir, R. Albulayhi, L. Almazyad, A. Alnahari, and B. Al-Khateeb. “The Effect of Metformin on Improving Survival Among Obese and Diabetic Patients Affected With COVID-19: Findings of a Meta-Analysis”. Journal of Health Informatics in Developing Countries, vol. 16, no. 2, Aug. 2022, https://jhidc.org/index.php/jhidc/article/view/374.