Funding for this research was provided by:
Uniformed Services University of the Health Sciences (HT9404-13-1-0007)
Received: 13 September 2019
Accepted: 17 March 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Walter Reed National Military Medical Center and the Uniformed Services University of the Health Sciences Institutional Review Boards. Participation was voluntary and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.