Funding for this research was provided by:
US Army Medical Research Acquisition Activity (W81XWH-06-2-0279)
Received: 9 July 2019
Accepted: 13 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: Regulatory approvals for this study were obtained from the United States Army Department of Clinical Investigation (DCI), the Brooke Army Medical Center Institutional Review Board and the Human Research Protection Office (HRPO) at United States Army Medical Research and Materiel Command.
: Not applicable.
: The authors declare that they have no competing interests.