1. Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, PR China
2. Peking University Fifth School of Clinical Medicine, Beijing, PR China
3. The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, PR China
4. Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, PR China
5. Institute of Geriatric Medicine, Clinical Biobank, Beijing Hospital, National Center of Gerontology, National Health Commission, Chinese Academy of Medical Sciences, Beijing, PR China
6. Affiliated Hospital of Qinghai University, Qinghai, PR China