Study concept and design: Vigen, O’Donnell, Bradley, Barqawi, Ho.
Acquisition of data: O’Donnell, Plomondon, Rumsfeld, Ho.
Analysis and interpretation of data: Vigen, O’Donnell, Barón, Grunwald, Maddox, Bradley, Barqawi, Woning, Wierman, Plomondon, Ho.
Drafting of the manuscript: Vigen, O’Donnell, Woning, Ho.
Critical revision of the manuscript for important intellectual content: O’Donnell, Barón, Grunwald, Maddox, Bradley, Barqawi, Woning, Wierman, Plomondon, Rumsfeld.
Statistical analysis: Vigen, O’Donnell, Barón, Grunwald.
Administrative, technical, or material support: Woning, Plomondon, Rumsfeld, Ho.
Study supervision: Barqawi.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: Dr Vigen was supported by a Cardiovascular Outcomes Research Fellowship through a Department of Veterans Affairs Graduate Medical Education Enhancement Grant. Drs Maddox and Bradley were supported by a Department of Veterans Affairs Health Services Research and Development Service Career Development Awards.
Role of the Sponsor: The Department of Veteran Affairs had no role in the design and conduct of the study: collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the Department of Veterans Affairs or the US government.
Correction: This article was corrected November 11, 2013, and on February 4, 2014, to ennumerate excluded patients in the text and in Figure 1.