Fig. 2From: Effectiveness of perioperative low-dose esketamine infusion for postoperative pain management in pediatric urological surgery: a prospective clinical trialComparison between groups of pain score at each time point. *P < 0.05 compared with H1 group; #P < 0.05 compared with H2 group; $P < 0.05 compared with ES2 groupBack to article page