1. Division of Hospital Medicine University of Tsukuba Hospital Tsukuba Japan
2. Department of Medicine Icahn School of Medicine at Mount Sinai, Mount Sinai Beth Israel New York New York USA
3. Department of Health Services Research, Faculty of Medicine University of Tsukuba Tsukuba Japan
4. Department of Pulmonary Medicine Keio University School of Medicine Tokyo Japan
5. Department of Cardiovascular Surgery Shizuoka Medical Center Shizuoka Japan
6. Division of Cardiology Montefiore Medical Center, Albert Einstein College of Medicine New York New York USA