1. Forecasted state-specific estimates of self-reported asthma prevalence-United States, 1998;The Centers for Disease Control and Prevention;JAMA,1999
2. Ambulatory health care visits by children: principal diagnosis and place of visit;Freid;Vital Health Stat 13,1998
3. National hospital ambulatory medical care survey: 1992 emergency department summary;Schappert;Vital Health Stat 13,1997
4. Nation hospital discharge survey;Gillum;Vital Health Stat 13,1998
5. The burden of pediatric asthma;Lenney;Pediatr Pulmonol Suppl,1997