1. Trends in asthma morbidity and mortality. American Lung Association Epidemiology & Statistics Unit Research and Program Services. November 2007
2. Publication bias and clinical trials;Dickerson;Control Clin Trials,1987
3. Identifying relevant studies for systematic reviews;Dickerson;BMJ,1994
4. Discrepancies between meta-analysis and subsequent large randomized controlled trials;LeLorier;N Engl J Med,1997
5. Guidelines for the diagnosis and management of asthma;National Asthma Education and Prevention Program Expert Panel Report 3,2007