Funding for this research was provided by:
Defense Health Agency (HU0001-11-1-0023)
Received: 10 August 2020
Accepted: 24 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: Due the secondary analysis of existing, de-identified data, this study was deemed exempt from human subjects review by the Institutional Review Board of the Uniformed Services University of the Health Sciences. Because of these conditions, written consent to participate, including by parents or guardians for children under 18, is not applicable.
: Due to the secondary analysis of de-identified data, consent for publication is not applicable.
: The authors declare that we have no competing interests.