North Coal Medical University;
Tangshan 063000;
China;
Heart Center;
Mei-Tan General Hospital;
Beijing 100028;
China;
Heart Center;
Chui-YanLiu General Hospital;
Beijing;
China;
Heart Center;
Fu-Wai hospital;
Peking Union Medcal College and Chinese Academy of Medical Science;
Beijing 100037;
China;
Clincal Research Institute;
School of Public Health;
Fudan University;
Shanghai 200090;
China;
Heart Center;
Peaking University People’s Hospital;
Beijing 100044;
China;