1. Centers for Disease Control and Prevention. Asthma-fast-stats web site. http://www.cdc.gov/asthma/faststats.html . Updated April 27, 2009. Accessed April 17, 2012.
2. von Maffei J, Beckett WS, Belanger K, et al. Risk factors for asthma prevalence among urban and nonurban African American children. J Asthma. 2001; 38(7): 555–564.
3. LaVeist T. Minority populations and health: an introduction to health disparities in the U.S. San Francisco, CA: Jossey-Bass; 2005.
4. National Heart, Lung, and Blood Institute. What is asthma web site. http://www.nhlbi.nih.gov/health/dci/Diseases/Asthma/Asthma_WhoIsAtRisk.html Updated February 1, 2011. Accessed April 17, 2012.
5. National Asthma Education and Prevention Program (NAEPP). Guidelines for the diagnosis and management of asthma. Expert Panel Report 3. US Dept of Health and Human Services; 2007.