1. Department of Nuclear Medicine (PET Center), Xiangya Hospital, Central South University, Changsha, P.R. China
2. Key Laboratory of Nanobiological Technology of National Health Commission, Xiangya Hospital, Central South University, Changsha, P.R. China
3. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, P.R. China
4. School of Photovoltaic Materials, Jiangxi New Energy Technology Institute, Xinyu, China