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Comparison of different adjuvant analgesia for paravertebral block in video-assisted thoracoscopic surgery: A double-blind randomized controlled trial

Fig 2

Comparison of VAS pain scores (A) at rest and (B) during coughing between the four groups.

Data were expressed as mean (standard deviation).

Fig 2

doi: https://doi.org/10.1371/journal.pone.0322589.g002