Fig. 2. Expression level of CD18 (A ), C11a (B ), CD11b (C ), and CD45 (D ) on neutrophils before, during, and after surgery. Antigen expression was determined as mean fluorescence intensity and is displayed as original value. Data show mean ± 1 SD with cardiopulmonary bypass (CPB) (closed triangles, n = 35, C : n = 21) or without CPB (open circles, n = 27, C : n = 15).