. "Dipeptidyl peptidase-4 inhibitor" . "diabetic drugs" . "dipeptidyl peptidase-4 (DPP-4) inhibitor" . "DPP-4 inhibitors" . "Dipeptidyl peptidase IV" . . "gliptins" . . "Dipeptidyl peptidase-4 inhibitor" . "DPP-4 Inhibitor" . . "DPP-4 inhibitor" . . "dipeptidyl peptidase-4 (DPP-4) inhibitors" . "dipeptidyl peptidase-4 inhibitor" .