aHospital for Special Surgery and NewYork-Presbyterian/Weill Cornell Medical Center, New York, NY; and

bSection of Orthopaedic Surgery, University of Calgary, Calgary, AB, Canada.

Reprints: Troy D. Bornes, MD, PhD, MPH, Hospital for Special Surgery, 535 East 70th St, New York, NY 10021 (e-mail: [email protected]).

Supported through internal departmental funding from the Orthopaedic Trauma Service of the Hospital for Special Surgery.

The authors report no conflict of interest.

Institution at which the work was performed: Hospital for Special Surgery, New York, NY.

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