1. Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
2. School of Mathematical Sciences, Fudan University, Shanghai 200433, P. R. China
3. Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
4. Shanghai Center for Systems Biomedicine and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China