About the Authors

Christine R. Harris

charris@ucsd.edu

Affiliation University of California San Diego, La Jolla, California, United States of America

Caroline Prouvost

Affiliation University of California San Diego, La Jolla, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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