1. Department of RadiologyBeijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences Beijing P. R. China
2. Graduate School of Peking Union Medical College Beijing P. R. China
3. Department of UrologyBeijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences Beijing P. R. China
4. GE Healthcare, MR Research Beijing P. R. China
5. Department of PathologyBeijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences Beijing P. R. China