1. Department of Anesthesiology and Pain Medicine, Gyeongsang National University Hospital, Jinju, 660-702, Korea.
2. Department of Anesthesiology and Pain Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 660-702, Korea.
3. Department of Physiology, Gyeongsang National University School of Medicine, Jinju, 660-702, Korea.
4. Center for Functional Connectomics, Korea Institute of Science and Technology, Seoul, 136-791, Korea.
5. Department of Anesthesiology and Pain Medicine, Gyeongsang National University School of Medicine, Jinju, 660-702, Korea.