1. Division of Cardiology, Department of Internal Medicine, The Jikei University Kashiwa Hospital
2. Division of Cardiology, Saitama Cardiovascular Respiratory Center
3. Division of Cardiology, Fuji City General Hospital
4. Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Daisan Hospital
5. Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine
6. Division of Cardiology, Nishisaitama-chuo National Hospital