serum total thyroxine ( t-t4 ) , free thyroxine ( f-t4 ) , total triiodothyronine ( t-t3 ) , free triiodothyronine ( f-t3 ) , reverse triiodothyronine ( r-t3 ) and thyroxine-binding globulin ( tbg ) levels were measured by radioimmunoassay in pregnants , infants , children and adolescents .
C0021270
infants
C0008059
children