1. Division of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
2. Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
3. Center for General Internal Medicine and Emergency Care, Kinki University School of Medicine, Osaka, Japan
4. Division of Cardiology, Tenri Hospital, Japan
5. Division of Laboratory Medicine, Kokura Memorial Hospital, Kitakyushu, Japan