1. Department of Geriatrics; Lanzhou General Hospital of the People's Liberation Army; Lanzhou China
2. Department of Cardiology; Tangdu Hospital, Fourth Military Medical University; Xi'an China
3. Department of Cardiovascular Surgery, Xijing Hospital; Fourth Military Medical University; Xi'an China
4. Department of Cardiovascular Surgery; General Hospital of Shenyang Military Area Command; Shenyang China
5. Department of Cardiology; Lanzhou General Hospital of the People's Liberation Army; Lanzhou China
6. Department of ophthalmology; Lanzhou General Hospital of the People's Liberation Army; Lanzhou China
7. Department of Cardiovascular Surgery; Lanzhou General Hospital of the People's Liberation Army; Lanzhou China
8. Department of Thoracic Surgery; Tangdu Hospital, Fourth Military Medical University; Xi'an China
9. Department of Biomedical Engineering; Fourth Military Medical University; Xi'an China
10. Department of Clinical Laboratory; Lanzhou General Hospital of the People's Liberation Army; Lanzhou China