1. Department of Cardiology, Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, China
2. Pulmonary Vessel and Thrombotic Disease, Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
3. Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
4. Department of Cardiology, Beijing Taikang Yanyuan Rehabilitation Hospital, Beijing, China
5. Arrhythmia Center, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing, China
6. Geriatric Center, West China Hospital, Sichuan University, Chengdu, China