NRG4 and diabetic kidney disease: In addition to routine tests, the hemoglobin, albumin, lymphocyte, and platelet (HALP) score, uric acid levels, C-reactive protein to serum albumin ratio (CAR), Neuregulin-4 (Nrg-4), a new adipokine released from brown adipose tissue, mean platelet volume to lymphocyte ratio, and the monocyte-to-lymphocyte ratio can serve as diagnostic predictors for diabetic nephropathy [37–44].