1. The First Affiliated
Hospital, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510275, China
2. School of Engineering and Applied Sciences,
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States
3. Department of Food Science, Cornell University, Ithaca, New York 14853, United States
4. Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States