S. . Kumar, S. . Varadan, V. . P, V. . Sekar, T. . Singh, and R. S. . Singh, “Prevalence of vitamin B12 deficiency and its associated neuropathy in patients taking long term metformin therapy in Type 2 diabetes mellitus”, J. Appl. Pharm. Res., vol. 11, no. 5, pp. 39-43, Dec. 2023.