Similarly, in patients with Crohn’s disease, there were no absolute differences in serum CCL20 levels between VD-deficient and sufficient patients, and no direct correlations were observed between 1,25(OH)2 concentrations or 1,25(OH)2/25-hydroxyvitamin D activation ratios and serum CCL20 levels (data not shown). Here, CCL20 is linked to Crohn disease.