Mohammed Ismail, Serwan. “Does Metformin in Different Doses Cause Vitamin B12 Deficiency? A Cross-Sectional Study: Metformin And Vitamin B12 Deficiency”. Cellular and Molecular Biology 69, no. 2 (February 28, 2023): 45–51. Accessed November 21, 2024. https://mail.cellmolbiol.org/index.php/CMB/article/view/4674.