About the Authors

Sara C. Mednick

smednick@ucsd.edu

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

Nicholas A. Christakis

Affiliation Department of Medicine, Harvard University, Boston, Massachusetts, United States of America

James H. Fowler

Affiliation Department of Political Science, 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: SCM JF. Analyzed the data: JF. Contributed reagents/materials/analysis tools: JF. Wrote the paper: SCM NAC JF.