FGF23 and chronic kidney disease: Additional future studies are warranted to further assess the value of the 24,25(OH)2D to 25D ratio or VMR and its correlation with clinical outcomes across racial/ethnic groups overall and in patients with CKD, as well as the effect of 1,25D analogs on FGF23 levels as potential mediators or predictors of CV events and/or death in patients on dialysis as noted earlier.