[1] Chinese Acad Med Sci & Peking Union Med Coll, Natl Ctr Cardiovasc Dis, Fuwai Hosp, Beijing, Peoples R China
[2] Chinese Peoples Liberat Army Gen Hosp, Med Ctr 2, Geriatr Cardiol Dept, Beijing, Peoples R China
[3] Chinese Peoples Liberat Army Gen Hosp, Natl Clin Res Ctr Geriatr Dis, Beijing, Peoples R China