1. Cardiology Department, the Second Hospital of Tianjin Medical University; Tianjin China
2. Cardiovascular Center, Korea University Guro Hospital; Seoul Korea
3. Cardiology Department, Tianjin Nankai Hospital; Tianjin China
4. Chonnam National University Hospital; Gwangju Korea
5. Yeungnam University Hospital; Daegu Korea
6. Keimyung University Dongsan Medical Center; Daegu Korea
7. Konyang University; Daejon Korea
8. Gacheon University Gil Hospital; Inchon Korea