to understand why congenital dislocated hip ( cdh ) was diagnosed late ( mean age : nine months ) in children admitted to the children 's hospital of philadelphia ( chop ) , 714 consecutive chop admissions , aged zero to two years , and 947 consecutive newborns delivered at the hospital , university of pennsylvania ( hup ) were examined for cdh .
C0008059
children 's
C0021289
newborns