1. NHLBI, National Asthma Education Program, Expert Panel Report. Guidelines for the diagnosis and management of asthma. Publication No. 97-4051. Bethesda, MD, U.S. Department of Health and Human Services; 1997.
2. Asthma;Kent,1993
3. American Lung Association Website, Trends in asthma morbidity and mortality, 2001. www.lungusa.org/data/asthma/asthmach_cha.html.
4. National Institute of Environmental Health Sciences. Fact Sheet #9; July, 1997.
5. Histamine, bradykinin, and their antagonists;Babe,1996