About the Authors

Lucy J. Colwell

lcolwell@fas.harvard.edu

Affiliation School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts, United States of America

Michael P. Brenner

Affiliation School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: LJC MPB. Wrote the paper: LJC MPB. Conceived and designed the calculations: LJC MPB.