1. Department of Cardiology Japanese Red Cross Ashikaga Hospital Ashikaga Japan
2. Department of Internal Medicine, Section of Cardiovascular Medicine Yale School of Medicine, Yale New Haven Hospital Center of Outcomes Research and Evaluation New Haven Connecticut USA
3. Department of Cardiovascular Medicine Gunma University Graduate School of Medicine Maebashi Japan
4. Department of Cardiology Keio University School of Medicine Tokyo Japan
5. Division of Cardiology Fukuyama Cardiovascular Hospital Fukuyama Japan
6. Department of Cardiovascular Medicine Kyushu University Fukuoka Japan
7. Department of Cardiology Aichi Medical University Nagakute Japan
8. Division of Cardiology Teikyo University Hospital Tokyo Japan