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Fig. 4. The accumulated intravenous patient-controlled analgesia (IV-PCA) dose was assessed at 1, 6, 24, and 48 hours after the operation. There was no significant difference between the two groups. Data are expressed as mean ± standard deviation. Repeated measures ANOVA was performed to analyze the interaction between time and group.
Korean J Pain 2020;33:378~385 https://doi.org/10.3344/kjp.2020.33.4.378
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