1. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine, Peking University Cancer Hospital & Institute, Beijing 100142, China
2. Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
3. Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, China