A. Saleemi, Mohammad Soraish, Abdul Salam, and M. G. Shabnam, “Prevalence and Clinical Predictors of Vitamin B12 Deficiency in Patients Receiving Long-Term Metformin Therapy”, Pak J Healthc Res, vol. 2, no. 2, pp. 5–9, Dec. 2025, Accessed: Oct. 07, 2026. [Online]. Available: https://pjhr.com.pk/index.php/journal/article/view/36