1. Division of Cardiovascular Medicine, Nephrology and Neurology, University of the Ryukyus School of Medicine
2. Second Department of Surgery, University of the Ryukyus School of Medicine
3. Department of Clinical Laboratories, University of the Ryukyus School of Medicine
4. Blood Transfusion Department, University of the Ryukyus School of Medicine
5. Division of Vascular Surgery, Department of Surgery, Nagoya University, Graduate School of Medicine