1. NHLBI says asthma still a problem but more groups fighting it [press release];National Institutes of Health, National Heart, Lung, and Blood Institute Communications Office,2001
2. Expert Panel Report 2: Clinical Practice Guidelines: Guidelines for the Diagnosis and Management of Asthma;National Asthma Education and Prevention Program,1997
3. Inhaled steroids and the risk of hospitalization for asthma;Donahue;JAMA.,1997
4. Inhaled corticosteroids and the prevention of readmission to hospital for asthma;Blais;Am J Respir Crit Care Med.,1998