References
Fontaine KR, Redden DT, Wang C, Westfall AO, Allison DB. Years of life lost due to obesity.
JAMA. 2003 Jan 8;289(2):187-93.
Rogers RG, Powell-Griner E. Life expectancies of cigarette smokers and non-smokers in the United States. Soc Sci Med 1991;32 (10):1151-1159.
CIA World Factbook: Life expectancy