1. Department of Gastroenterology, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, People’s Republic of China
2. Medical School of Chinese PLA, Beijing, People’s Republic of China
3. Department of Laboratory Medicine, Second Medical Center, Chinese PLA General Hospital, Beijing, People’s Republic of China
4. Institute of Geriatrics, National Clinical Research Center of Geriatrics Disease, Second Medical Center, Chinese PLA General Hospital, Beijing, People’s Republic of China
5. Department of Oncology, Fifth Medical Center, Chinese PLA General Hospital, Beijing, People’s Republic of China
6. MRC/BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom