1. Department of Vascular Surgery, Kokura Memorial Hospital
2. Department of Surgery and Surgical Science, Graduate School of Medicine, Kyushu University
3. Division of Vascular Surgery, Department of Surgery, Nagoya University Graduate School of Medicine
4. Department of Surgery, Hiroshima Red Cross Hospital and Atomic-Bomb Survivors’ Hospital
5. Department of Surgery, Hidaka Coloproctological Clinic
6. Department of Cardiology, Kokura Memorial Hospital
7. Department of Vascular Surgery, Steel Memorial Yawata Hospital