Funding for this research was provided by:
National Science Foundation (NSF BCS-042217)
Received: 5 July 2018
Accepted: 10 January 2019
First Online: 18 February 2019
Ethics approval and consent to participate
: All data collection methods were approved and monitored by the Duke University Institutional Animal Care and Use Committee, protocol # A319–10-12.
: Not applicable.
: The authors declare that they have no competing interests.
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