Fig. 4From: Intrathecal morphine administration reduces postoperative pain and peripheral endocannabinoid levels in total knee arthroplasty patients: a randomized clinical trialTrajectories of serum NAE and endocannabinoid levels. Levels of serum PEA, OEA, AEA, and 2-AG levels for each patient at baseline and 4Â h after TKA surgeryBack to article page