1. School of Life Sciences Tianjin University Tianjin 300072 China
2. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine School of Public Health Xiamen University Xiamen 361102 China
3. Departments of Diagnostic Radiology and Surgery Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore
4. Departments of Chemical and Biomolecular Engineering, and Biomedical Engineering Faculty of Engineering National University of Singapore Singapore 117597 Singapore
5. Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore
6. Nanomedicine Translational Research Program NUS Center for Nanomedicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore