Studies of the prevalence of asthma in childhood.
D000293:Adolescent; D000367:Age Factors; D001208:Asia; D001249:Asthma / Q000453:epidemiology*; D044383:Black People; D002648:Child; D004739:England; D004781:Environmental Exposure; D004785:Environmental Pollutants; D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D044469:Racial Groups; D014900:West Indies
D004785:Environmental Pollutants