About the Authors

Cheng Lv

Affiliation School of Physics, Peking University, Beijing, China

Xiaoguang Li

Affiliation LMAM and School of Mathematical Sciences, Peking University, Beijing, China

Fangting Li

li_fangting@pku.edu.cn (LF); tieli@pku.edu.cn (LT).

Affiliations School of Physics, Peking University, Beijing, China, Center of Quantitative Biology, Peking University, Beijing, China

Tiejun Li

li_fangting@pku.edu.cn (LF); tieli@pku.edu.cn (LT).

Affiliation LMAM and School of Mathematical Sciences, Peking University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CL XL FL TL. Performed the experiments: CL XL. Analyzed the data: CL XL FL TL. Contributed reagents/materials/analysis tools: CL XL FL TL. Wrote the paper: CL XL FL TL.