1. Department of Cardiology; The Second Affiliated Hospital of Chongqing Medical University; 400010 Chongqing China
2. Hospital Centrocardio, Rua Domingues de Sá, no. 410-Icaraí, Niterói; 24220090 Rio de Janeiro Brazil
3. Department of Cardiology; Chongqing Zhongshan Hospital; Chongqing China
4. Department of Cardiology; The Fifth People's Hospital of Chongqing; Chongqing China
5. Duke University Medical Center; 27705 Durham 508 Fulton Street NC USA
6. Duke Clinical Research Institute; Durham NC USA