1. Cutler RG. Evolutionary persective of human longevity. In: Hazzard WR, Andres R, Bierman EL, et al. (eds) Principles of Geriatric Medicine and Gerontology. McGraw-Hill, New York, 1985:16.
2. National Center for Health Statistics, Hyattsville, MD, 1997.
3. Bureau of the Census. Sixty-five Plus in the United States. Statistical Brief 95,1995.
4. Greville TN, Bayo F, Foster R. United States Life Tables of Causes of Death: 1960–71, vol. 1, no. 5. Technical report.
5. Roush W. Live long and prosper? Science 1996;273:42–46.