Funding for this research was provided by:
National Institutes of Health (R01AI0833680)
Received: 15 June 2017
Accepted: 23 November 2017
First Online: 4 December 2017
Ethics approval and consent to participate
: Not applicable, because this study does not involve humans, animals or plants. Field permissions were obtained for all collections.
: Not applicable
: The authors declare that they have no competing interests.
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