1. Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
2. Department of Nuclear Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen 518107, China
3. Institute of Biomedical Engineering, Shenzhen Bay Laboratory, Shenzhen, Guangdong 518000, China
4. Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
5. Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States