Gomaa Sulaiman, Najua Ferrara, Ali Elbahi, and Salah Elbaruni. “Vitamin B12 Deficiency in Type 2 Diabetes Patients Using Metformin”. AlQalam Journal of Medical and Applied Sciences (April 10, 2023): 160–165. Accessed December 23, 2024. https://uta.edu.ly/journal/index.php/Alqalam/article/view/232.