1. Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
2. Department of Cardiology, Geriatrics Hospital of Jiangsu Province, Nanjing, China.
3. Department of Geriatrics, Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
4. Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing, China.