Fig. 2From: The effect of opioid-free anesthesia on the quality of recovery after gynecological laparoscopy: study protocol for a prospective randomized controlled trialStandard Protocol Items: Recommendations for Interventional Trials (adapted from SPIRIT figure). VAS, visual analog scale; TNF, tumor necrosis factor; IL interleukin; MnSOD, manganese superoxide dismutase; MMP, matrix metalloproteinaseBack to article page