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2. Summary health statistics for U.S. children: National Health Interview Survey, 1997;Bloom;Vital Health Stat,2002
3. Inner city asthma;Jones,2003
4. National survey of prevalence of asthma among children in the United States, 1976 to 1980;Gergen;Pediatrics,1988
5. Self-reported asthma prevalence among adults–United States, 2000;Center for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2001