About the Authors

Mark J. Bradshaw
Department of Mechanical Engineering, Boston University, Boston, Massachusetts, United States of America

Man C. Cheung, Daniel J. Ehrlich, Michael L. Smith
Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America

Corresponding Author

msmith@bu.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MJB MCC DJE MLS. Performed the experiments: MJB MCC. Analyzed the data: MJB. Contributed reagents/materials/analysis tools: MJB MCC DJE MLS. Wrote the paper: MJB MLS.