About the Authors

R. Blythe Towal, Brian W. Quist, Mitra J. Z. Hartmann
Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, United States of America

Venkatesh Gopal
Department of Physics, Elmhurst College, Elmhurst, Illinois, United States of America

Joseph H. Solomon, Mitra J. Z. Hartmann
Department of Mechanical Engineering, Northwestern University, Evanston, Illinois, United States of America

Corresponding Author

m-hartmann@northwestern.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RBT BWQ VG MJZH. Performed the experiments: RBT BWQ MJZH. Analyzed the data: RBT BWQ VG JHS. Contributed reagents/materials/analysis tools: RBT BWQ VG JHS. Wrote the paper: RBT BWQ MJZH.