1. Department of Cardiology, Affiliated Hospital of Panzhihua University, Panzhihua 617000, Sichuan, P.R. China
2. Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
3. Department of Plastic Surgery, Affiliated Hospital of Panzhihua University, Panzhihua 617000, Sichuan, P.R. China
4. Department of Critical Care Medicine, The Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong, P.R. China
5. Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing 100730, P.R. China
6. Peking University Fifth School of Clinical Medicine, Beijing Hospital, Beijing 100730, P.R. China