Submitted for Publication: April 2, 2012; final revision received July 2, 2012; accepted July 12, 2012.
Author Contributions: Dr Puyo had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Puyo and Dahms. Acquisition of data: Puyo and Dahms. Analysis and interpretation of data: Puyo and Dahms. Drafting of the manuscript: Puyo and Dahms. Critical revision of the manuscript for important intellectual content: Puyo and Dahms. Statistical analysis: Puyo. Obtained funding: Puyo. Administrative, technical, and material support: Dahms. Study supervision: Dahms.
Financial Disclosure: None reported.
Funding/Support: Support was provided by the Department of Anesthesiology and Critical Care, Saint Louis University.
Previous Presentations: Research from this article was presented in abstract form at the International Anesthesia Research Society Meeting; March 29 to April 1, 2008; San Francisco, California; and at the American Thoracic Society (ATS) Meeting; May 16-21, 2008; Toronto, Ontario, Canada; and the ATS Meeting; May 15-20, 2009; San Diego, California.