1. An aging world: international population reports;Khole;Appetite,2016
2. Velkoff V a., Hogan H. An aging nation: the older population in the United States;Ortman;US Dep Commer,2014
3. Frailty as a predictor of death or new disability after surgery: a prospective cohort study;McIsaac;Ann Surg,2018
4. How does frailty factor into mortality risk assessment of a middle-aged and geriatric trauma population?;Konda;Geriatr Orthop Surg Rehabil,2017
5. Frailty in older adults: evidence for a phenotype;Fried;J Gerontol Ser A Biol Sci Med Sci,2001