1. Sicras-Mainar A, Navarro-Artieda R. Economic impact of combining metformin with dipeptidyl peptidase-4 inhibitors in diabetic patients with renal impairment in spanish patients. Diabetes Metab J. 2015; 39:74–81.
2. Cho YM, Wideman RD, Kieffer TJ. Clinical application of glucagon-like peptide 1 receptor agonists for the treatment of type 2 diabetes mellitus. Endocrinol Metab (Seoul). 2013; 28:262–274.
3. Karagiannis T, Boura P, Tsapas A. Safety of dipeptidyl peptidase 4 inhibitors: a perspective review. Ther Adv Drug Saf. 2014; 5:138–146.
4. Liu Y, Hu Y. Novel DPP-4 inhibitors against diabetes. Future Med Chem. 2014; 6:793–808.
5. Davidson MH. Potential impact of dipeptidyl peptidase-4 inhibitors on cardiovascular pathophysiology in type 2 diabetes mellitus. Postgrad Med. 2014; 126:56–65.