1. Current population reports, series P-25, No. 952: Projections of the population of the United States by age, sex and race 1988 to 2080;U.S. Census Bureau,1989
2. Considerations in prescribing for the older patient;Johnson,1998
3. Trauma in the elderly patient;Victorino;Arch Surg,2003
4. Principles of mammalian aging;Kohn,1971