Funding for this research was provided by:
U.S. Department of Veterans Affairs (HSR&D IIR 09-056)
Text and Data Mining valid from 2019-03-30
Received: 23 January 2019
Revised: 5 March 2019
Accepted: 20 March 2019
First Online: 30 March 2019
Compliance with ethical standards
: This research was approved by the Institutional Review Board at the DVAHCS. All participants provided written informed consent.
: The authors had full control of all primary data and allow the journal to review their data if requested.