INS and type 2 diabetes mellitus: In patients without T2D and in controls, there were no significant correlations between chromogranin and the markers of glucose homeostasis (controls: glucose AUC 0.143, p = 0.787, glucose incremental r = −0.314, p = 0.544, insulin AUC r = −143, p = 0.797; insulin AUC incremental r = −0.143, p = 0.797; patients no T2D: glucose AUC r = −0.140, p = 0.665; glucose incremental AUC r = −0.252, p = 0.430; insulin AUC r = −0.357, p = 0.255; insulin incremental AUC r = −0.308, p = 0.331).