Accepted for Publication: February 23, 2015.
Published Online: May 13, 2015. doi:10.1001/jamasurg.2015.0404.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Williams, Harskamp, Bose, Smith, Lopes.
Drafting of the manuscript: Williams, Bose.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Bose.
Obtained funding: Alexander.
Administrative, technical, or material support: Williams, Harskamp.
Study supervision: Williams, Harskamp, Lawson, Alexander, Smith, Lopes.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was funded by the Duke Clinical Research Institute.
Role of the Funder/Sponsor: The Duke Clinical Research Institute had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.