1. Federal Interagency forum on Aging Related Statistics. Older Americans: key indicators of well-being.,2010
2. CDC
Public health and aging: trends in aging: United States and worldwide [cited 2012 May 1]. Available from: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5206a2.htm.
3. NIH State-of-the-Science Conference statement: preventing Alzheimer's disease and cognitive decline;Daviglus,2010