1. Clinical assessment and diagnostic approach to common problems;Brown,1999
2. Understanding the evidence: diagnostic accuracy of physical findings. Evidence-based physical diagnosis;McGee,2001
3. GRADE Working Party. Grading quality of evidence and strength of recommendations;BMJ,2004
4. Fakhoury K, Seilheimer D, Hoppin A. Approach to wheezing in children. 2008. Available at: http://www.uptodate.com. Accessed April 17, 2008.
5. Asthma and wheezing in the first six years of life. The Group Health Medical Associated;Martinez;N Engl J Med,1995