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Change in human leukocyte antigen-DR expression in the open cholecystectomy group and laparoscopic cholecystectomy group. Regarding human leukocyte antigen-DR values, the difference between baseline values and post-operative values were significant in both groups (using the Friedman test, aP < 0.05). LC: Laparoscopic cholecystectomy; OC: Open cholecystectomy.
