1. Department of Cardiology, Kosin University Gospel Hospital
2. Cardiovascular Medicine, Hokko Memorial Clinic
3. Health Science University of Hokkaido
4. Department of Cardiology, Cardiovascular Center, Kyung Hee University Hospital at Gangdong
5. Department of Geriatrics, Nagoya University Graduate School of Medicine
6. Cardiovascular Medicine, Juntendo University Graduate School of Medicine
7. Department of Cardiology, Gachon University Gil Medical Center
8. Gachon Cardiovascular Research Institute