Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Cardiology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Sonography, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Vascular Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Nephrology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;
Department of Cardiology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China;