CKD patients showed no correlation between the area of carotid adventitial neovascularization and serum sKlotho (r = −0.078; p = 0.625) (Supplemental Figure S2d), phosphorus (r = 0.215; p = 0.171), FGF23 (r = −0.118; p = 0.458), or PTH (r = 0.122; p = 0.442) levels. This evidence concerns the gene FGF23 and chronic kidney disease.