About the Authors

Andrew E. Brennan

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

Maurice A. Smith

mas@seas.harvard.edu

Affiliations School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America, Center for Brain Science, Harvard University, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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