Andrew Gnanaprakasam J, Veeramani G, and Manjanna K. “PROLONGED DURATION AND DOSE OF METFORMIN THERAPY AND ITS ASSOCIATED EFFECT OF VITAMIN B12 DEFICIENCY AMONG TYPE II DM PATIENTS: A CROSS SECTIONAL STUDY”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 4, Apr. 2023, pp. 791-02, doi:10.53555/jptcp.v30i4.2884.