1. Department of Anesthesiology and Pain Medicine, Jeju National University School of Medicine, Jeju, Korea.
2. Department of Anesthesiology and Pain Medicine, Gyeongsang National University School of Medicine, Jinju, Korea.
3. Department of Pharmacology, Gyeongsang National University School of Medicine, Jinju, Korea.
4. Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Korea.