Document is current

Article History

Received: 12 September 2018

Accepted: 15 December 2019

First Online: 6 January 2020

Ethics approval and consent to participate

: The study protocol was reviewed and approved by the Walter Reed Army Institute of Research and Naval Medical Research Institutional Animal Care and Use Committee in compliance with all applicable Federal regulations governing the protection of animals in research.

: Not Applicable.

: The authors declare that they have no competing interests. CCC, RH, MJ, and WMC are US Government employees. The work of these individuals was prepared as part of official government duties. Title 17 U.S.C. §105 provides that ‘Copyright protection under this title is not available for any work of the United States Government’. Title 17 U.S.C. §101 defines a U.S. Government work as a work prepared by a military service member or employee of the U.S. Government as part of that person’s official duties. The views expressed are those of the authors and do not necessarily reflect the official policy or position of the Department of the Navy, Department of the Army, Department of Defense, nor the U.S. Government.