1. Department of Medical Informatics, Korea University College of Medicine, Seoul, Korea.
2. Division of Cardiology, Department of Internal Medicine, Korea University Anam Hospital, Seoul, Korea.
3. Department of Biostatistics, Korea University College of Medicine, Seoul, Korea.
4. Division of Cardiology, Department of Internal Medicine, Korea University Ansan Hospital, Ansan, Korea.
5. Department of Cardiology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea.
6. Division of Cardiology, Department of Internal Medicine, Konkuk University Medical Center, Seoul, Korea.
7. Division of Cardiology, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
8. Division of Cardiology, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
9. Division of Cardiology, Department of Internal Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
10. Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea.
11. Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea.