Funding for this research was provided by:
U.S. Department of Veterans Affairs (XVA 65-018)
Text and Data Mining valid from 2020-03-18
Received: 22 July 2019
Accepted: 4 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the VHA Greater Los Angeles Healthcare System Institutional Review Board (PCC 2019-010070).
: Not applicable
: The authors declare that they have no competing interests.