1 Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China.
2 School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
3 Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, Massachusetts, 02115, USA.
4 Key Laboratory of Systems Biomedicine Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China.
5 Key Laboratory of Systems Biomedicine Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China. aoping@sjtu.edu.cn.