1. Health Management Center, Xiangya Hospital Central South University Changsha China
2. Department of Nuclear Medicine, XiangYa Hospital Central South University Changsha China
3. Department of Automation, Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China
4. Department of Radiology, Xiangya Hospital Central South University Changsha China
5. Key Laboratory of Biological Nanotechnology of National Health Commission Changsha China
6. National Clinical Research Center for Geriatric Diseases (XIANGYA) Changsha China
7. Department of Emergency, XiangYa Hospital Central South University Changsha China