Figure 1. Urine N-acetyl-beta-glucosaminidase (NAG) concentration before and after infusion of 5% human serum albumin (HSA; n = 14) or 5% recombinant human hemoglobin (rHb1.1.; n = 34). The upper limit of normal for urine NAG is 6.1 U/l. *P < 0.05 versus HSA at the same time point. #P < 0.05 versus preinfusion values for same group. Values are means +/- SD.