About the Authors
- William R. Hobbs
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Affiliation Division of Social Sciences, University of California San Diego, La Jolla, California, United States of America
- James H. Fowler
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* E-mail: fowler@ucsd.edu
Affiliation Division of Social Sciences, Division of Medical Genetics, University of California San Diego, La Jolla, California, United States of America
Competing Interests
The authors received funding from a commercial source (RealAge, Inc). This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: WRH JHF. Analyzed the data: WRH. Wrote the paper: WRH JHF.