Klotho Deficiency Accelertates Stem Cells Aging by Impairing Telomerase Activity [1] [1] Ullah M, Sun Z Klotho Deficiency Accelertates Stem Cells Aging by Impairing Telomerase Activity The journals of gerontology. Series A, Biological sciences and medical sciences. 2018 Nov;74(9):1396-1407. doi: 10.1093/gerona/gly261