Ekmekci et al. [87] reported that elevated serum calcium and parathyroid hormone levels were independent predictors of impaired endothelial function and endothelial nitric oxide polymorphism (eNOS), which is often associated with coronary artery disease, and hypertension, did not appear to have modifying effect on the endothelial function in his study. This evidence concerns the gene PTH and Hypertension.