146 Wang Wang F. F. He He Y. Y. Zhang Zhang R. R. Zeng Zeng Q. Q. Zhao Zhao X. X. Combination therapy of metformin plus dipeptidyl peptidase-4 inhibitor versus metformin plus sulfonylurea and their association with a decreased risk of cardiovascular disease in type 2 diabetes mellitus patients Combination therapy of metformin plus dipeptidyl peptidase-4 inhibitor versus metformin plus sulfonylurea and their association with a decreased risk of cardiovascular disease in type 2 diabetes mellitus patients Medicine (Baltimore). The gene discussed is DPP4; the disease is type 2 diabetes mellitus.