00424nas a2200145   4500000000100000000000100001008004100002100001000043700001100053700001500064245016800079300001000247490000700257022001400264       2015                            d1 aO. Yu1 aH. Yin1 aL. Azoulay00aThe combination of DPP-4 inhibitors versus sulfonylureas with metformin after failure of first-line treatment in the risk for major cardiovascular events and death  a383-90 v39  a1499-2671