Institute of Geriatrics;
Chinese PLA General Hospital;
28 Fuxing Road;
Beijing 100853;
China;
Department of Acupuncture;
Chinese PLA General Hospital;
28 Fuxing Road;
Beijing 100853;
China;
Department of Epidemiology;
the 4th Military Medical University;
No.17;
Changle West Road;
Xi'an 710032;
Shaanxi Province;
China;
Department of Cardiology;
the 4^th Military Medical University;
No.17;
Changle West Road;
Xi'an 710032;
Shaanxi Province;
China;
Institute of Geriatric Cardiology;
Chinese PLA General Hospital;
28 Fuxing Road;
Beijing 100853;
China;