1. Department of Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine, Kurume, Japan
2. Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Japan
3. Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University, Kanazawa, Japan
4. PET Center and Department of Radiology, Division of Nuclear Medicine, Kurume University School of Medicine, Kurume, Japan