Kirschtein, R. (2000) Disease-Specific Estimates of Direct and Indirect Costs of Illness and Department of Health and Human Services NIH Support, Washington DC. http://ospp.od.nih.gov/ecostudies/COIreportweb.htm
 National Institutes of Health National Heart, Lung and Blood Institute Fact Book Fiscal Year, US Department of Health and Human Services, Washington, DC., 2008. www.nhlbi.nih.gov/about/factbook/FactBookFinal. pdf
 Wu, E.Q., Birnbaum, H.G., Shi, L., Ball, D.E., Kessler, R.C., Moulis, M. and Aggarwal, J. (2005) The economic burden of Schizophrenia in the United States in 2002, Journal of Clinical Psychiatry, 66(9), 1122-1129.
 Fiore, M.C., Jaén, C.R., Baker, T.B., et al. (2009) Treating tobacco use and dependence: 2008 date. quick reference guide for clinicians. Rockville, Department of Health and Human Services. Public Health Service. http://www.ahrq.gov/clinic/tobacco/tobaqrg.pdf
 (2004) National heart, lung, and blood ?nstitute. Mor- bidity and mortality: 2004 chartbook on cardiovascular, lung, and blood diseases. US Department of Health and Human Services, Washington, DC.
 Yelin, E., Murphy, L., Cisternas, M.G., Foreman, A.J., Pasta, D.J., Helmick, C.G. (2007) Medical care ex- penditures and earnings loses among persons with arthritis and other rheumatic condition in 2003. Arthritis and Rheumatism, 56(5), 1397-1407.
 Onukwugha, E. and Zuckerman, I.H. (2009) The total economic burden of overactive bladder in the United States: A disease-specific approach. American Journal of Managed Care, 15(4 Suppl.), S90-S97.
 Hutchinson, A.B., Farnham, P.G., Dean, H.D., Ekwueme, D.U., del Rio, C., Kamimoto, L., et al. (2006) The economic burden of HIV in the United States in the era of highly active antiretroviral therapy: Evidence of continuing racial and ethnic differences. Journal of Acquired Immune Deficiency Syndromes, 43(4), 451-457.
 Malone, D.C., Lawson, K.A., Smith, D.H., Arrighi, H.M., Battista, C. (1997) A cost of illness study of allergic rhinitis in the United States. Journal of Allergy and Clinical Immunology, 99(1 Pt 1), 22-27.
 Chesson, H.W., Blandford, J.M., Gift, T.L., Tao, G. and Irwin, K.L. (2004) The estimated direct medical cost of sexually transmitted diseases among American youth, 2000 perspectives on sexual and reproductive health. 36 (1), 11-19.