From the Centers for Disease Control and Prevention. Measuring childhood asthma prevalence before and after the 1997 redesign of the National Health Interview Survey--United States.
D000293:Adolescent; D001249:Asthma / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D006306:Health Surveys; D006801:Humans; D007223:Infant; D011159:Population Surveillance; D015995:Prevalence; D014481:United States / Q000453:epidemiology