Fig. 5. Plasma (A ) nitrate and (B ) nitrite levels measured before and after transfusion of fresh and stored packed erythrocytes (PRBC) in awake lambs. Some lambs received inhaled nitric oxide during and after transfusion of stored PRBC. *P < 0.05, stored PRBC + iNO value differs from both fresh PRBC and stored PRBC, ANOVA. All data mean ± SD. iNO = inhaled nitric oxide; PRBC = packed erythrocytes.