*The Micheli Center for Sports Injury Prevention, Waltham, Massachusetts;
†Harvard Medical School, Boston, Massachusetts;
‡Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital, Boston, Massachusetts;
§Division of Emergency Medicine, Department of Medicine, Boston Children's Hospital, Boston, Massachusetts;
¶Princeton University, Princeton, New Jersey; and
‖Harvard University, Cambridge, Massachusetts.
Corresponding Author: Andrea Stracciolini, MD, Division of Sports Medicine, Department of Orthopaedic Surgery, Division of Pediatric Emergency Medicine, Department of Medicine, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115 ([email protected]).
The authors acknowledge financial assistance from the Robert Wood Johnson Foundation, specifically the Health Policies Scholars Human Capital Program, granted to H. L. Friedman.
Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.cjsportmed.com).
The authors report no conflicts of interest.
Received August 07, 2013
Accepted February 10, 2014