1. The Department of Cardiology; General Hospital of Shenyang Military Region; Shenyang China
2. The Department of Cardiology, The First Clinical College, Liaoning University of Traditional Chinese Medicine; Shenyang China
3. The Department of Cardiology, Henan Provincial People's Hospital; Zhengzhou China
4. The Department of Cardiology, Anhui Provincial Hospital; Hefei China
5. The Department of Cardiology, Third Affiliated Hospital of Liaoning Medical College; Jinzhou China
6. Catheterization Laboratory, Fuwai Hospital, Chinese Academy of Medical Sciences; Beijing, China