1. Department of Cardiovascular Medicine, Chonnam National University College of Medicine, Gwangju, Korea.
2. Department of Cardiology, Yeungnam University College of Medicine, Daegu, Korea.
3. Department of Cardiology, Kyungpuk National University College of Medicine, Daegu, Korea.
4. Department of Cardiology, Busan National University College of Medicine, Busan, Korea.
5. Department of Cardiology, Chungnam National University College of Medicine, Daejeon, Korea.
6. Department of Cardiology, Chonbuk National University College of Medicine, Jeonju, Korea.
7. Department of Cardiovascular Medicine, Kyung Hee University College of Medicine, Seoul, Korea.
8. Department of Cardiology, Chungbuk National University College of Medicine, Cheongju, Korea.
9. Department of Cardiology, Korea University College of Medicine, Guro Hospital, Seoul, Korea.
10. Department of Cardiology, Konyang University College of Medicine, Daejeon, Korea.
11. Department of Cardiovascular Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
12. Department of Cardiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.