1. Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea.
2. Department of Neurosurgery, Gyeongsang National University School of Medicine, Jinju, Korea.
3. Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea.
4. Gyeongsang Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Korea.