Funding for this research was provided by:
U.S. Department of Defense (HU0001-10-1-0018, HT9404-12-1-0019)
Military Infectious Disease Research Program (HT9404-12-1-0012)
Received: 15 November 2018
Accepted: 12 February 2019
First Online: 22 February 2019
Compliance with ethical standards
: All authors: no conflicts.
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