Hospital utilization by children.
D000367:Age Factors; D002648:Child; D002673:Child, Hospitalized; D002675:Child, Preschool; D006752:Hospital Planning; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007902:Length of Stay; D010414:Pennsylvania; D014481:United States; D014798:Vital Statistics