Funding for this research was provided by:
U.S. Department of Veterans Affairs (1IK2CX000856- 01A1)
Received: 20 September 2017
Accepted: 5 July 2018
First Online: 19 July 2018
Ethics approval and consent to participate
: The study was approved by the Emory University Institutional Review Board (IRB#69642) and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests
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