serum assays in 128 children and adolescents showed that serum osteocalcin levels accurately reflect the various stages of statural growth : peak levels were found at three different ages , i.e . infants ( 21.8 +/- 4.9 ng/ml ) , children over seven ( 19.4 +/- 5.2 ng/ml ) , and adolescents undergoing the early stages of puberty ( 22.5 +/- 4.2 ng/ml ) .
C0021270
infants
C0008059
children