1. the Second Department of Internal Medicine, Nagasaki University School of Medicine
2. the First Department of Internal Medicine, Nagasaki University School of Medicine
3. the Second Department of Surgery, Nagasaki University School of Medicine
4. Department of Internal Medicine, Nagasaki City Hospital
5. Department of Internal Medicine, Nagasaki Red Cross Atomic Bomb Hospital
6. Department of Internal Medicine, Sasebo Municipal General Hospital
7. Department of Internal Medicine, Nagasaki Rousai Hospital
8. Institute for Clinical Research, Nagasaki Chuo National Hospital