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Additional Information

Competing Interests

The authors have no competing interests to report.

Author Contributions

Brian K Whitlock conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Joseph A Daniel performed the experiments, analyzed the data, reviewed drafts of the paper.

Lisa L Amelse reviewed drafts of the paper.

Valeria M Tanco wrote the paper, reviewed drafts of the paper.

Kelly A Chameroy performed the experiments, wrote the paper, reviewed drafts of the paper.

F Neal Schrick contributed reagents/materials/analysis tools.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

1) Berry College Institutional Animal Care and Use Committee. 2) 2011/12-010

Funding

This project was supported by the Center of Excellence in Livestock Diseases and Human Health from the University of Tennessee, College of Veterinary Medicine. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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