Published Online: May 27, 2015. doi:10.1001/jamasurg.2015.0647.
Study concept and design: Chung, Giuliano.
Acquisition, analysis, or interpretation of data: Chung, Gangi, Amersi, Zhang.
Drafting of the manuscript: Chung, Gangi, Zhang, Giuliano.
Critical revision of the manuscript for important intellectual content: Chung, Amersi, Giuliano.
Statistical analysis: Zhang.
Obtained funding: Gangi, Giuliano.
Administrative, technical, or material support: Chung, Amersi, Giuliano.
Conflict of Interest Disclosures: None reported.
Funding/Support: The collection, management, and analysis of data for this work was supported by the Margie and Robert E. Petersen Foundation and the Fashion Footwear Charitable Foundation of New York.
Role of the Funder/Sponsor: The funders/sponsors 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.