1. Department of Internal Medicine, Cardiovascular Center Sejong General Hospital Bucheon Republic of Korea
2. Hospital Clinico San Carlos IDISSC and Universidad Complutense de Madrid Madrid Spain
3. Department of Medicine Inje University Ilsan Paik Hospital Goyang Republic of Korea
4. Department of Internal Medicine, Division of Cardiology, Samsung Medical Center, Heart Vascular Stroke Institute Sungkyunkwan University School of Medicine Seoul Republic of Korea
5. Department of Internal Medicine, Cardiovascular Center Seoul National University Hospital Seoul Republic of Korea
6. Department of Internal Medicine, Cardiovascular Center Tachikawa General Hospital Nagaoka Japan
7. Department of Biostatistics Korea University School of Medicine Seoul Korea
8. Department of Medicine Keimyung University Dongsan Medical Center Daegu Republic of Korea
9. Division of Cardiology Ulsan Hospital Ulsan Korea