1. National surveillance for asthma—1980-2004;Moorman;MMWR Morb Mortal Wkly Rep,2007
2. Guidelines for the Diagnosis and Management of Asthma,2007
3. Corticosteroid therapy for acute asthma;Rowe;Resp Med,2004
4. Guidelines for the emergency management of asthma in adults—CAEP/CTS Asthma Advisory Committee;Beveridge;CMAJ,1997
5. The 2008 British Guideline on the Management of Asthma: a national clinical guideline;Thorax,2008