POLR2D and retinal disorder: Lastly, as we all know, many reports [36, 37] show that complication ofdiabetes, like retinopathy, nephropathy have a close relationship with serumlevels of RBP4, in our study, after logistic regression, controlled by diabetescomplication, RPB4 still is the risk factor of NDCM, which show RBP4 is clinicalvaluable marker for diagnoses for DCM in diabetes.