1. A Changing Population. The Wall Street Journal. June 10, 2010.
http://online.wsj.com/public/resources/documents/st_census0610b_20100610.html
. Accessed 21 November, 2010.
2. Pew Research Center. Social and Demographic Trends. February 11, 2008.
http://pewsocialtrends.org/2008/02/11/us-population-projections-2005-2050/
. Accessed 21 November, 2010.
3. Centers for Disease Control and Prevention. National Center for Health Statistics. Health Data Interactive.
www.cdc.gov/nchs/hdi.htm
. Accessed November 11, 2010.
4. Weiss KB. Eliminating asthma disparities: a national workshop to set a working agenda. Chest 2007;132:753S-6S.
5. Lai CK, Beasley R, Crane J, Foliaki S, Shah J, Weiland S. Global variation in the prevalence and severity of asthma symptoms: phase three of the International Study of Asthma and Allergies in Childhood (ISAAC). Thorax 2009;64:476–83.