About the Authors

David J. Sharrow

Contributed equally to this work with: David J. Sharrow, James J. Anderson

dsharrow@uw.edu

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

James J. Anderson

Contributed equally to this work with: David J. Sharrow, James J. Anderson

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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