1. Department of Cardiology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea.
2. Cardiovascular Center, Busan Regional Cardio-cerebrovascular Center, Dong-A University Hospital, Busan, Korea.
3. Department of Inje University Baek Hospital, Inje University College of Medicine, Busan, Korea.
4. Department of Cardiology, Inje University Haeundae Baek Hospital, Inje University College of Medicine, Busan, Korea.
5. Department of Cardiology, Dong-Eui Medical Center, Busan, Korea.
6. Department of Cardiology, Dong Rae Bong Seng Hospital, Busan, Korea.
7. Department of Cardiology, Gupo Sungshim Hospital, Busan, Korea.
8. Department of Cardiology, BHS Hanseo Hospital, Busan, Korea.
9. Metropolitan City Fire and Safety Headquarters, Busan, Korea.