Study concept and design: Mortensen, Fine, Alvarez, Good, Restrepo, Anzueto.
Acquisition, analysis, or interpretation of data: Mortensen, Halm, Pugh, Copeland, Metersky, Johnson, Alvarez, Frei, Good, Restrepo, Downs.
Drafting of the manuscript: Mortensen, Copeland, Alvarez, Good, Restrepo, Anzueto.
Critical revision of the manuscript for important intellectual content: Halm, Pugh, Copeland, Metersky, Fine, Johnson, Alvarez, Frei, Good, Restrepo, Downs, Anzueto.
Statistical analysis: Mortensen, Johnson.
Obtained funding: Mortensen.
Administrative, technical, or material support: Mortensen, Pugh, Frei, Good.
Study supervision: Mortensen, Halm, Anzueto.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Copeland reported having received grants from the National Institute of Nursing Research, the Veterans Health Administration, and Xenex Corp. Dr Metersky reported having been a speaker/consultant for Pfizer until 2011. Dr Frei reported having received grants from Bristol-Myers Squibb, Ortho-McNeil Janssen, Pfizer, and Forest. No other disclosures were reported.
Funding/Support: This study was supported by a grant from the National Institute of Nursing Research (R01NR010828), and Dr Restrepo was supported by the National Heart, Lung, and Blood Institute (K23HL096054). This material is the result of work supported with resources and the use of facilities at the VA North Texas Health Care System.
Role of the Sponsor: The funding sources 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 represent the views of the Department of Veterans Affairs, National Institute of Nursing Research, or the National Institutes of Health.