25 Fajol Fajol A A Komaba Komaba AFH AFH Fukagawa Fukagawa M M FGF23 and Klotho in Chronic Kidney Disease FGF23 and Klotho in Chronic Kidney Disease Encyclopedia of Bone Biology Encyclopedia of Bone Biology 2020 2020 57 57 64 64. This evidence concerns the gene FGF23 and chronic kidney disease.