1. Department of Anesthesiology and Pain Medicine, Gyeongsang National University Hospital, Jinju, Gyeongsangnam-do, Korea
2. Department of Anesthesiology and Pain Medicine, Gyeongsang National University College of Medicine, Gyeongsang National University Hospital, Jinju, Gyeongsangnam-do, Korea
3. Institute of Health Sciences, Gyeongsang National University, Jinju, Korea