About the Authors

Isaac A. Janson

Affiliation Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan, United States of America

Yen P. Kong

Affiliation Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, United States of America

Andrew J. Putnam

putnam@umich.edu

Affiliation Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: IAJ YPK AJP. Performed the experiments: IAJ YPK. Analyzed the data: IAJ AJP. Contributed reagents/materials/analysis tools: IAJ YPK AJP. Wrote the paper: IAJ YPK AJP.