About the Authors

Eric Kim

Affiliation Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Lin Sun

Affiliation Department of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts, United States of America

Christopher V. Gabel

Affiliation Department of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts, United States of America

Christopher Fang-Yen

fangyen@seas.upenn.edu

Affiliation Department of Bioengineering, 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: CFY CVG. Performed the experiments: EK LS CVG CFY. Analyzed the data: EK LS CVG CFY. Wrote the paper: EK LS CVG CFY.