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Fig. 3. Cumulative fentanyl consumption over time in the erector spinae plane block (ESPB) and control groups. Cumulative fentanyl consumption at all postoperative time points was lower in the ESPB than in the control group. Data are expressed as median (interquartile range). *P < 0.01.
Korean J Pain 2019;32:206~214 https://doi.org/10.3344/kjp.2019.32.3.206
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