1. Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
2. Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan
3. Cardiovascular Center, Kansai Rosai Hospital, Amagasaki, Japan
4. Division of Cardiology, Osaka General Medical Center, Osaka, Japan
5. Cardiovascular Division, Osaka Police Hospital, Osaka, Japan
6. Division of Cardiology, Osaka Rosai Hospital, Sakai, Japan
7. Department of Cardiovascular Medicine, Yao Municipal Hospital, Yao, Japan
8. Department of Cardiology, Osaka Hospital, Japan Community Healthcare Organization, Osaka, Japan
9. Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University Graduate School of Medicine, Suita, Japan