DPP4 and diabetes mellitus: 193 Dworak Dworak M. M. Bader Bader G. G. Giani Giani G. G. Treatment persistence, hypoglycaemia and clinical outcomes in type 2 diabetes patients with dipeptidyl peptidase-4 inhibitors and sulphonylureas: A primary care database analysis Treatment persistence, hypoglycaemia and clinical outcomes in type 2 diabetes patients with dipeptidyl peptidase-4 inhibitors and sulphonylureas: A primary care database analysis Diabetes Obes Metab.