Fig. 2From: The acupoint herbal plaster for the prevention and treatment of postoperative nausea and vomiting after PLIF with general anesthesia: study protocol for a multicenter randomized controlled trialSPIRIT Checklist. T1, pre-operation; T2, postoperative 8 h; T3, postoperative 24 h; T4, postoperative 48 hBack to article page