About the Authors

Xiaopeng Song

Affiliation Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China

Yi Zhang

Affiliation School of Life Science and Technology, Xidian University, Xi’an, Shanxi, China

Yijun Liu

yjliufl@gmail.com

Affiliation Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China

Competing Interests

Co-author Yijun Liu is a PLOS ONE Editorial Board member. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: XS YL. Performed the experiments: XS. Analyzed the data: XS. Contributed reagents/materials/analysis tools: XS YZ YL. Wrote the paper: XS YZ YL. Supervised the work: YZ YL.