Bruising in healthy 3-year-old children.
D002657:Child Development; D002675:Child, Preschool; D003288:Contusions / Q000453:epidemiology* / Q000523:psychology; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills; D010414:Pennsylvania; D012737:Sex Factors; D012923:Social Class