Shastri, S., Katz, R., Rifkin, D., Fried, L., Odden, M., Peralta, C., Chonchol, M., Siscovick, D., Shlipak, M., Newman, A., & Sarnak, M. (2012). Kidney Function and Mortality in Octogenarians: Cardiovascular Health Study All Stars. : John Wiley & Sons, Inc.