1. The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory; Department of Biomedical Engineering; College of Life Science and Technology; Huazhong University of Science and Technology; Wuhan 430074 China
2. Department of Mechanical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139 USA
3. Brain Research Center; Wuhan Institute of Physics and Mathematics; Chinese Academy of Sciences; Wuhan 430071 China