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Systemic endotoxin concentration significantly increased during the course of surgery but returned to near baseline by day 2. Regarding endotoxin values, the difference between baseline values and postoperative values were significant in both groups (using the Friedman test, aP < 0.05). Besides, significance was obtained by comparing values between groups 60, 90 and 120 min after surgery, using the Mann-Whitney U test, P < 0.05.
