1. Division of Cardiology, Department of Internal Medicine, Incheon St. Mary’s Hospital
2. The Catholic University of Korea
3. Seoul St. Mary’s Hospital
4. Uijeongbu St. Mary’s Hospital, Uijeongbu
5. Uijeongbu St. Mary’s Hospital
6. Yeouido St. Mary’s Hospital
7. St. Paul’s Hospital
8. Daejeon St. Mary’s Hospital
9. Bucheon St. Mary’s Hospital
10. St. Vincent’s Hospital