About the Authors

Bertrand C. W Tanner

Affiliation Department of Bioengineering, University of Washington, Seattle, Washington, United States of America

Thomas L Daniel

Affiliation Department of Biology, University of Washington, Seattle, Washington, United States of America

Michael Regnier

To whom correspondence should be addressed. E-mail: mregnier@u.washington.edu

Affiliation Department of Bioengineering, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BCWT, TLD, and MR conceived and designed the experiments, analyzed the data, and wrote the paper. BCWT performed the experiments.