Respiratory dieease in childhood.
D000293:Adolescent; D000367:Age Factors; D000397:Air Pollution; D002648:Child; D002675:Child, Preschool; D004739:England; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012140:Respiratory Tract Diseases / Q000453:epidemiology* / Q000401:mortality; D012737:Sex Factors; D012907:Smoking / Q000150:complications; D012923:Social Class; D014852:Wales