Department of Anesthesiology;
Shengjing Hospital;
China Medical University;
Shenyang 110004;
Liaoning Province;
China Department of Anesthesiology;
Shengjing Hospital;
China Medical University;
Shenyang 110004;
Liaoning Province;
China Department of Anesthesiology;
Shengjing Hospital;
China Medical University;
Shenyang 110004;
Liaoning Province;
China;