Department of Gerontology;
Xiqing Hospital;
Tianjin;
China;
Cardiovascular Division of Gerontology;
Pingjin Hospital;
Logistic University of CAPF;
Tianjin;
China;
Postgraduate School of Tianjin University of Traditional Chinese Medicine;
Tianjin;
China;
Department of Radiology;
Tangdu Hospital;
the Fourth Military Medical University;
Xi'an;
Shaanxi;
China;
University of Ottawa Heart Institute;
Ottawa;
ON;
Canada;