Speech defects in a national sample of children aged seven years.
D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012494:Sampling Studies; D012737:Sex Factors; D012923:Social Class; D013064:Speech Disorders / Q000453:epidemiology*; D013070:Speech Therapy; D013342:Stuttering; D006113:United Kingdom