1. Division of Cardiology, Department of Internal Medicine, Ilsan Paik Hospital, Inje University
2. Division of Cardiology, Severance Hospital, Yonsei University College of Medicine
3. Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine
4. Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Keimyung University Dongsan Hospital, Keimyung University School of Medicine
5. Division of Cardiology, Gachon University Gil Medical Center
6. Division of Cardiology, Gangnam Severance Hospital, Yonsei University College of Medicine
7. Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center
8. Division of Physiology, Department of Biomedical Laboratory, Daegu Health College