1. School of Biomedical Engineering, MED-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
2. Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, California 90095, United States
3. Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
4. Molecular Biology Institute, Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, California 90095, United States
5. National Center for Nanoscience and Nanotechnology, Beijing 100190, China