About the Authors

Jeremy A. Owen

Affiliation King’s College, University of Cambridge, Cambridge, United Kingdom

Ernest Barreto

Affiliation School of Physics, Astronomy, and Computational Sciences and The Krasnow Institute for Advanced Study, George Mason University, Fairfax, Virginia, United States of America

John R. Cressman

jcressma@gmu.edu

Affiliation School of Physics, Astronomy, and Computational Sciences and The Krasnow Institute for Advanced Study, George Mason University, Fairfax, Virginia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JAO EB JRC. Performed the experiments: JAO EB JRC. Analyzed the data: JAO EB JRC. Contributed reagents/materials/analysis tools: JAO EB JRC. Wrote the paper: JAO EB JRC. Designed software used in analysis: JAO.