GCG and diabetes mellitus: In our study, most diabetes patients took medications of the type mentioned (n = 147 metformin monotherapy, n = 65 insulin monotherapy; n = 202 metformin combined with other oral specific medication, n = 31 plus insulin, n = 12 glinides, n = 23 DPP4I, n = 50 sulfonylureas, n = 7 incretin mimetics (non-exclusive groups)).