Article History
Received: 22 August 2019
Accepted: 12 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: The Institutional Review Board of the Armed Forces Medical Command (AFMC-16051-IRB-16-041) approved this study and waived the requirement for informed consent because of the observational nature of the study.
: Not applicable.
: The authors declare that there are no conflicts of interest.