FGF23 and chronic kidney disease: Vascular calcification is another feature of MR‐induced vasculopathy (Jaffe & Mendelsohn, 2005; Voelkl, Alesutan, Leibrock, Kuro‐o, & Lang, 2013); evidence suggests interplay between MR activation and the klotho fibroblast growth factor (FGF)‐23 axis, which drives soft tissue and vascular mineralization in CKD‐mineral and bone disorder (Voelkl et al., 2013; Zhang et al., 2016).