1. Centers for Disease Control and Prevention. 2015 National Health Interview Survey (NHIS) Data [Internet] [cited 2018 Mar 6]. Available from: https://www.cdc.gov/asthma/nhis/2015/table4-1.htm
2. Rui P, Hing E, Okeyode T. National ambulatory medical care survey: 2014 state and national summary tables [Internet]. 2014 [cited 2018 Mar 7]. Available from: https://www.cdc.gov/nchs/data/ahcd/namcs_summary/2014_namcs_web_tables.pdf
3. Akinbami LJ, Moorman JE, Bailey C, et al. Trends in asthma prevalence, health care use, and mortality in the United States, 2001–2010. NCHS data brief, no 94. Hyattsville, MD: National Center for Health Statistics. 2012.
4. Asthma management and control in the United States: Results of the 2009 Asthma Insight and Management survey
5. Asthma referrals: a key component of asthma management that needs to be addressed