Accepted for Publication: February 25, 2014.
Published Online: June 9, 2014. doi:10.1001/jamainternmed.2014.1066.
Study concept and design: Peritz, Vaughn, Chung.
Acquisition, analysis, or interpretation of data: Vaughn, Ciocca, Chung.
Drafting of the manuscript: Peritz, Vaughn, Chung.
Critical revision of the manuscript for important intellectual content: All authors.
Administrative, technical, or material support: Vaughn, Ciocca, Chung.
Study supervision: Ciocca, Chung.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented as an abstract in poster form at the American Medical Society for Sports Medicine Annual Meeting; April 17-21, 2013; San Diego, California.