Li L, Wang Y, Gao W, Yuan C, Zhang S, Zhou H, Huang M, Yao X. Klotho Reduction in Alveolar Macrophages Contributes to Cigarette Smoke Extract-induced Inflammation in Chronic Obstructive Pulmonary Disease. Journal of Biological Chemistry. 2015 Nov;290(46):27890–900. doi: 10.1074/jbc.m115.655431.