About the Authors

Gang Hu

Affiliation Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota, United States of America

Bin He

binhe@umn.edu

Affiliation Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GH BH. Performed the experiments: GH. Analyzed the data: GH. Wrote the paper: GH BH.