1. Division of Chemistry, Department of Medical Sciences, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
2. Department of Pathology, Division of Pathophysiology, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
3. Department of Radiology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan