1. Laboratory of Clinical Nuclear Medicine, Department of Nuclear Medicine, National Clinical Research Center for Geriatrics, West China Hospital, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610041, China
2. Huaxi MR Research Center, Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China