1. Clinical Practice Guidelines: Expert Panel Report 2: Guidelines for the Diagnosis and Management of Asthma;National Institutes of Health, National Asthma and Education and Prevention Program,1997
2. Global Strategy for Asthma Management and Prevention NHLBI/WHO Workshop Report;National Institutes of Health, Global Initiative for Asthma,1995
3. NHLBI Data Fact Sheet: Asthma Statistics;National Institutes of Health,1999
4. Asthma control vs. asthma severity;Cockcroft;J Allergy Clin Immunol.,1996
5. Measuring asthma control;Bateman;Curr Opin Allergy Clin Immunol.,2001