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