1. Department of Thoracic and Cardiovascular Surgery, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-290, Korea.
2. Department of Anatomy, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-290, Korea.
3. Department of Physiology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-290, Korea.
4. Department of Pathology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-290, Korea.
5. Department of Preventive Medicine, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-290, Korea.
6. Clinical Research Institute, Gyeongsang National University Hospital, Jinju 660-290, Korea.