1. The global burden of asthma;Braman;Chest,2006
2. Scottish Intercollegiate Guidelines Network British Guideline on the Management of Asthma. A national clinical guideline www.sign.ac.uk/pdf/sign101.pdf
3. Centers for Disease Control and Prevention Vital signs www.cdc.gov/vitalsigns/asthma/
4. Centers for Disease Control and Prevention Trends in asthma prevalence, health care, and mortality in the United States, 2001-2010 www.cdc.gov/nchs/data/databriefs/db94.htm
5. Clayton S Paediatric asthma: overcoming barriers to an improved quality of life British Journal of Nursing 2005 80-5