Accepted for Publication: April 15, 2013.
Published Online: November 27, 2013. doi:10.1001/jamasurg.2013.3176.
Study concept and design: Quraishi, Bittner, Blum, Camargo.
Acquisition of data: Quraishi, Blum.
Analysis and interpretation of data: Quraishi, Bittner, Hutter, Camargo.
Drafting of the manuscript: Quraishi, Bittner.
Critical revision of the manuscript for important intellectual content: Bittner, Blum, Hutter, Camargo.
Statistical analysis: Bittner.
Administrative, technical, or material support: Blum, Hutter.
Study supervision: Quraishi, Camargo.
Conflict of Interest Disclosures: Dr Quraishi serves on the board of directors of the Vitamin D Council in an advisory capacity. No other disclosures were reported.
Funding/Support: Dr Quraishi received support from the National Institutes of Health grants 5T32GM007592-33 and UL1 RR025758. Dr Camargo received support from the National Institutes of Health grants R01 AI093723 and U01 AI087881.
Role of the Sponsor: The National Institutes of Health 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.
Correction: This article was corrected online December 20, 2013, for changes in the Results section.