About the Authors

Mark J. Bradshaw

Affiliation Department of Mechanical Engineering, Boston University, Boston, Massachusetts, United States of America

Man C. Cheung

Affiliation Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America

Daniel J. Ehrlich

Affiliation Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America

Michael L. Smith

msmith@bu.edu

Affiliation Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America

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.