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History
- Received October 10, 2012
- Revision received March 27, 2013
- Accepted April 9, 2013
- First published May 15, 2013.
- Version of record published May 15, 2013.
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Copyright © 2013 the authors 0270-6474/13/338729-13$15.00/0
Author Information
Author contributions
Author contributions: S.-L.L., J.P.O., and A.R. designed research; S.-L.L. performed research; S.-L.L., J.P.O., and A.R. analyzed data; S.-L.L., J.P.O., and A.R. wrote the paper.
Disclosures
- Received October 10, 2012.
- Revision received March 27, 2013.
- Accepted April 9, 2013.
This work was supported by the National Science Foundation (Grants SES-0851408, SES-0926544, and SES-0850840), National Institutes of Health (Grant R01 AA018736), the Betty and Gordon Moore Foundation, and the Lipper Foundation.
The authors declare no competing financial interests.
- Correspondence should be addressed to Antonio Rangel, Division of Humanities and Social Sciences, MC 228-77 California Institute of Technology, Pasadena, CA 91125. rangel{at}hss.caltech.edu
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