Published Online: March 3, 2014. doi:10.1001/jamainternmed.2013.12809.
Study concept and design: Jones, Mack.
Acquisition of data: Jones.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Jones.
Critical revision of the manuscript for important intellectual content: Paulozzi, Mack.
Statistical analysis: Jones.
Obtained funding: Jones.
Administrative, technical, or material support: Jones, Paulozzi.
Conflict of Interest Disclosures: None reported.
Disclaimer: The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention.