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Figure 1. Intensity of postoperative pain determined by the visual analogue scale (VAS, "0" is no pain and "10" the worst imaginable pain). Data are reported as means ± SD for 25 patients in each group. Post-anesthesia care unit (PACU) period included 15, 30 and 45 min after the operation in the operating theatre; 1, 2, 4, 6, and 24 h were in the ENT surgery department. *P < 0.05 compared to groups 1 and 2 according to VAS scores (Mann-Whitney U-test).