1. Cardiovascular Center; Incheon St. Mary's Hospital, The Catholic University of Korea; Incheon South Korea
2. Cardiovascular Center; Seoul St. Mary's Hospital, The Catholic University of Korea; Seoul South Korea
3. Cardiovascular Center; Chonnam National University Hospital, Chonnam National University; Gwangju South Korea
4. Cardiovascular Center; St. Paul's Hospital, The Catholic University of Korea; Seoul South Korea
5. Cardiovascular Center; Uijeongbu St. Mary's Hospital, The Catholic University of Korea; Uijeongbu South Korea