1. Department of Intensive Care Unit, Chiba-Hokusoh Hospital, Nippon Medical School
2. First Department of Internal Medicine, Nippon Medical School
3. Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science
4. Department of Internal Medicine, Fujita Health University School of Medicine
5. Department of Cardiology and Pneumology, Dokkyo University School of Medicine
6. Cardiopulmonary Division, Department of Medicine, Keio University School of Medicine
7. Department of Cardiovascular Medicine, Shizuoka National Hospital
8. Intensive and Coronary Care Unit, Nippon Medical School
9. Department of Cardiovascular Center, Chiba-Hokusoh Hospital, Nippon Medical School
10. Department of Internal Medicine, Tsurumi University School of Dental Science
11. Kusatsu General Hospital