1. Key Laboratory of Cell Proliferation and Regulation Biology, Ministry of Education, Beijing Key Laboratory of Gene Engineering Drugs and Biological Technology College of Life Science, Beijing Normal University, Beijing, People's Republic of China.
2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China.
3. Department of Systems Science, School of Management, Beijing Normal University, Beijing, People's Republic of China.