Published Online: July 28, 2014. doi:10.1001/jamainternmed.2014.3435.
Study concept and design: Lewis, Birnie.
Acquisition, analysis, or interpretation of data: Lewis, Nery, Birnie.
Drafting of the manuscript: Lewis, Birnie.
Critical revision of the manuscript for important intellectual content: Lewis, Nery, Birnie.
Statistical analysis: Lewis, Birnie.
Administrative, technical, or material support: Lewis, Nery, Birnie.
Study supervision: Birnie.
Conflict of Interest Disclosures: None reported.