About the Authors

Ming-Xi Liu

Affiliations Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China, University of Chinese Academy of Sciences, Beijing, China

Xing Chen

Affiliations Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China, National Center for Mathematics and Interdisciplinary Sciences, Chinese Academy of Sciences, Beijing, China

Geng Chen

Affiliation Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University, Beijing, China

Qing-Hua Cui

cuiqinghua@hsc.pku.edu.cn (QC); yangy@amss.ac.cn (GY)

Affiliation Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University, Beijing, China

Gui-Ying Yan

cuiqinghua@hsc.pku.edu.cn (QC); yangy@amss.ac.cn (GY)

Affiliations Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China, National Center for Mathematics and Interdisciplinary Sciences, Chinese Academy of Sciences, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GYY QHC MXL XC. Performed the experiments: MXL XC. Analyzed the data: MXL GC. Wrote the paper: MXL XC QHC GYY.