1. Ortman J, Velkoff V, Hogan H. An Aging nation: the older population in the United States. Population Estimates and Projections. US Census Bureau Issued May 2014. Available at: http://www.census.gov/prod/2014pubs/p25-1140.pdf Accessed January 7, 2015.
2. American College of Surgeons. National Trauma Data Bank 2014: Annual Report. Available at: https://www.facs.org/∼/media/files/quality%20programs/trauma/ntdb/ntdb%20annual%20report%202014.ashx. Accessed January 30, 2014.
3. The effect of preexisting conditions on mortality in trauma patients;Morris;JAMA,1990
4. Old age as a criterion for trauma team activation;Demetriades;J Trauma,2001
5. Preventable complications and death from multiple organ failure among geriatric trauma victims;Pellicane;J Trauma,1992