The cysteine flux , its de novo synthesis and release from protein breakdown , and erythrocyte glutathione synthesis rate were measured in 12 children with edematous SAM in the fed state by using stable isotope tracers at 3 clinical phases as follows : 3 1 d ( SE ) [ clinical phase 1 ( CP1 ) ] , 8 1 d [ clinical phase 2 ( CP2 ) ] , and 14 2 d ( clinical phase 3 ) after admission .