1. Department of Biomedical Engineering, College of Engineering, Peking University, P. R. China
2. School of Optical-Electronic and Computer Engineering, Shanghai University of Science and Technology, P. R. China
3. Department of Automation, Tsinghua University, Beijing 100084, P. R. China
4. Bioinfomatics Division, TNLIST, MOE Key Laboratory of Bioinformatics and Center for Synthetic & System Biology, Tsinghua University, Beijing 100084, P. R. China
5. Faculty of Science, Institute for Biomedical Materials and Devices (IBMD) University of Technology, Australia