1. Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine , 67 Asahi-machi, Kurume 830-0011 , Japan
2. Department of Clinical Laboratory Medicine, Kurume University Hospital , Kurume , Japan
3. Division of Nephrology, Department of Internal Medicine, Kurume University School of Medicine , Kurume , Japan
4. Department of Surgery, Kurume University School of Medicine , Kurume , Japan
5. Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine , Kurume , Japan