k ( killer ) and natural killer ( nk ) cells were investigated in peripheral blood of 76 children , preterm small for date babies ( n = 8 ) , preterm babies ( n = 15 ) , fullterm small for date babies ( n = 6 ) fullterm babies ( n = 7 ) and infants up to 12 months age ( n = 40 ) .
C0008059
children
C0021270
infants