1. Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, Pennsylvania 19122, United States
2. Department of Nuclear Medicine, Peking University First Hospital, Beijing, 100034, China
3. Departments of Radiology and Medical Physics, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
4. Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, 518060, China
5. School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China