About the Authors

Chao Zhang

Affiliation Department of Mechanical Engineering, the Johns Hopkins University, Baltimore, Maryland, United States of America

Tyson L. Hedrick

Affiliation Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Rajat Mittal

mittal@jhu.edu

Affiliation Department of Mechanical Engineering, the Johns Hopkins University, Baltimore, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CZ TH RM. Performed the experiments: CZ TH. Analyzed the data: CZ TH RM. Contributed reagents/materials/analysis tools: CZ TH RM. Wrote the paper: CZ TH RM.