1. Department of Geriatric Cardiology, Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing 100853, China
2. The First Surgical Department of Nanlou, Chinese PLA General Hospital, Beijing 100853, China
3. Department of Cardiology, Shanghai Changning Center Hospital, Shanghai 200336, China
4. Institute of Geriatrics, Chinese PLA General Hospital, Beijing 100853, China
5. Department of Cardiology, Tenth People’s Hospital, Tongji University, Shanghai 200072, China
6. College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, China