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Venous samples for hemolysis before and after blood infusion. The median (interquartile range) plasma venous blood values for cell-free plasma hemoglobin (CFPHb) and arginase-1 (Arg-1) obtained on Days 5 and 42. Levels of CFPHb and Arg-1 are increased after red cell infusion. Wilcoxon matched-pairs signed rank testing was performed.
