Windham BG, Griswold ME, Lirette S, Kucharska-Newton A, Foraker RE, Rosamond W, Coresh J, Kritchevsky S, Mosley TH. Effects of Age and Functional Status on the Relationship of Systolic Blood Pressure With Mortality in Mid and Late Life: The ARIC Study. J Gerontol A Biol Sci Med Sci. 2017 01; 72(1):89-94.