About the Authors

Julie Czupryna

Affiliation Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Andrew Tsourkas

atsourk@seas.upenn.edu

Affiliation Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JC AT. Performed the experiments: JC. Analyzed the data: JC AT. Contributed reagents/materials/analysis tools: JC AT. Wrote the paper: JC AT.