Funding for this research was provided by:
Bureau of Medicine and Surgery (WU60808)
Received: 26 March 2020
Accepted: 27 May 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: The study protocol was approved by the Naval Health Research Center Institutional Review Board in compliance with all applicable Federal regulations governing the protection of human subjects. Research data were derived from an approved Naval Health Research Center Institutional Review Board protocol, number NHRC.2003.0025.
: Not applicable.
: The authors declare that they have no competing interests.