Study concept and design: Greenberg.
Acquisition of data: Chen.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Chen.
Critical revision of the manuscript for important intellectual content: Chan, Scott, Greenberg.
Statistical analysis: Chen, Chan.
Administrative, technical, or material support: Scott, Greenberg.
Study supervision: Greenberg.
Conflict of Interest Disclosures: None reported.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the US Department of Veterans Affairs or the US government.