1. Center for Molecular Imaging and Nuclear Medicine; School for Radiological and Interdisciplinary Sciences (RAD-X); Soochow University; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions; Suzhou 215123 P.R. China
2. The Second Affiliated Hospital of Soochow University; Suzhou 215004 P.R. China
3. School for Radiological and Interdisciplinary Sciences (RAD-X); Soochow University; Suzhou 215123 P.R. China
4. Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P.R. China