1. UN Population Division. World Population Ageing 1950–2050. New York: United Nation, 2002. Accessed January 12 at: www.un.org/esa/population/publications/worldaging19502050/.
2. Active ageing: a policy framework;WHO,2002
3. Aging and infectious diseases in the developing world;Gavazzi;Clin Infect Dis,2004
4. Influenza vaccination and the risk of primary cardiac arrest;Siscovick;Am J Epidemiol,2000
5. Two-year follow-up of the FLU Vaccination Acute Coronary Syndrome (FLUVACS) Registry;Gurfinkel;Tex Heart Inst J,2004