1. School of Life Science, Beijing Institute of Technology, Beijing 100081, P. R. China
2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
3. State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Frontiers Science Center for New Organic Matter, Research Center for Analytical Sciences, College of Chemistry, Frontiers Science Center for Cell Responses, Nankai University, Tianjin 300071, P. R. China
4. Department of Neurobiology, School of Basic Medical Sciences, Peking University, Beijing 100083, P. R. China
5. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine, Peking University Cancer Hospital & Institute, Peking University, Beijing 100142, P. R. China
6. Department of Biomedical Engineering, Peking University, Beijing 100871, P. R. China