1. Department of Cardiology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
2. Fujian Institute of Coronary Artery Disease, Fuzhou, Fujian 350001, P.R. China
3. Fujian Heart Medical Center, Fuzhou, Fujian 350001, P.R. China
4. The Second Affiliated Hospital of Fujian Traditional Chinese Medical University, Fuzhou, Fujian 350003, P.R. China