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Changes in CD57+ cell percentages in perioperative period. A: at randomization; B: before operation; C: on the 2nd postoperative day; and D: on the 10th postoperative day. The difference in CD57+ percentages between treatment and con-trol groups at time points C and D was statistically significant, bP < 0.01. The differences in CD57+ percentages between treat-ment group and normal control on the 10th postoperative day was statistically significant, dP < 0.01.
