Children of seven years with marked speech defects.
D000342:Affective Symptoms / Q000453:epidemiology; D002648:Child; D002657:Child Development; D005260:Female; D006801:Humans; D007806:Language Disorders / Q000453:epidemiology; D008297:Male; D011932:Reading; D012917:Social Adjustment; D012923:Social Class; D013064:Speech Disorders / Q000453:epidemiology*; D014786:Vision Disorders