Fig. 2From: Effect of esketamine on the EC50 of remifentanil for blunting cardiovascular responses to endotracheal intubation in female patients under general anesthesia: a sequential allocation dose-finding studyDose–response curve of remifentanil. In group C, the EC50 was 3.91 ng/mL. In group E, the EC50 of remifentanil was 3.56 ng/mLBack to article page