About the Authors

Andrew M. Handorf

Affiliation Department of Orthopedics and Rehabilitation and Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

Wan-Ju Li

li@ortho.wisc.edu

Affiliation Department of Orthopedics and Rehabilitation and Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: W-JL AMH. Performed the experiments: AMH. Analyzed the data: AMH W-JL. Contributed reagents/materials/analysis tools: W-JL. Wrote the paper: AMH.