1. Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
2. Department of Nuclear Medicine, Zhongshan Hospital, Fudan University/Shanghai Institute of Medical Imaging, Shanghai 200032, China
3. Peking University Third Hospital, Beijing 100191, China
4. Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States