Karim, F., Najam, K., Sharif, A., Shakir, L., Ajmal, S., Anwar, A., Hussain, A., Khalid, H., Tufail, M. and Zaidi, A. (2018) “The therapeutic effectiveness of sitagliptin with niacin and chromium picolinate on glycosylated hemoglobin in type 2 diabetes mellitus patients”, Biomedical Research and Therapy, 5(8), pp. 2610-2619. doi: 10.15419/bmrat.v5i8.469.