1. The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics and Molecular Imaging Key Laboratory Systems Biology Theme Department of Biomedical Engineering College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China
2. Department of Nano Engineering University of California San Diego La Jolla CA 92093 USA
3. Department of Molecular and Cell Biology University of California, Berkeley Berkeley CA 94720 USA