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. 2020 Dec 18;16:1257–1265. doi: 10.2147/TCRM.S285244

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© 2020 Shang et al.

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Kaplan–Meier curves comparing time to VAS =4 within 48 hrs after operation in two groups (patients were censored if VAS did not reach 4 or above within 48 hrs after surgery); survival curve analysis (log-rank test): P=0.008.

Abbreviations: SAPB, serratus anterior plane block; VAS, visual analogue scale.