Mental and motor development in young mongol children.
D000367:Age Factors; D002675:Child, Preschool; D004314:Down Syndrome / Q000503:physiopathology; D005260:Female; D005581:Foster Home Care; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007360:Intelligence; D007361:Intelligence Tests; D008297:Male; D009043:Motor Activity; D012737:Sex Factors; D012923:Social Class