[1] Beijing An Zhen Hosp, Dept Epidemiol, Beijing, Peoples R China
[2] Peking Univ, Hosp 1, Dept Cardiol, Beijing, Peoples R China
[3] Beijing An Zhen Hosp, Dept Cardiol, Beijing, Peoples R China
[4] Fudan Univ, Zhongshan Hosp, Dept Cardiol, Shanghai, Peoples R China
[5] Gen Hosp Shenyang Mil Reg, Cardiovasc Rsch Inst, Shenyang, Peoples R China
[6] Gen Hosp Shenyang Mil Reg, Dept Cardiol, Shenyang, Peoples R China
[7] Amer Heart Assoc, Dept Global Strategies, Basel, Switzerland
[8] Amer Heart Assoc, Int Qual Improvement Dept, Dallas, TX USA
[9] Univ Calif Los Angeles, Div Cardiol, Los Angeles, CA USA
[10] Univ N Carolina, Div Cardiol, Chapel Hill, NC 27515 USA