Accepted for Publication: December 18, 2014.
Published Online: June 3, 2015. doi:10.1001/jamasurg.2015.0313.
Study concept and design: Margonis, Kim, Spolverato, Gupta, Cosgrove, Anders, Choti, Pawlik.
Acquisition, analysis, or interpretation of data: Margonis, Kim, Spolverato, Ejaz, Gupta, Karagkounis, Choti.
Drafting of the manuscript: Margonis, Spolverato, Gupta.
Critical revision of the manuscript for important intellectual content: Margonis, Kim, Spolverato, Ejaz, Cosgrove, Anders, Karagkounis, Choti, Pawlik.
Statistical analysis: Kim, Spolverato, Ejaz.
Administrative, technical, or material support: Spolverato, Gupta, Cosgrove, Karagkounis, Pawlik.
Study supervision: Anders, Choti, Pawlik.
Conflict of Interest Disclosures: None reported.
Disclaimer: Dr Pawlik is a deputy editor of JAMA Surgery. He was not involved in the evaluation or decision to accept this article for publication.