aDepartment of Orthopaedic Surgery, Medical College of Wisconsin, Milwaukee, WI; and

bMarquette University, Orthopaedic and Rehabilitation Engineering Center, Milwaukee, WI.

Reprints: Mei Wang, PhD, Department of Orthopaedic Surgery, Medical College of Wisconsin, 9200 W, Wisconsin Ave, P.O. Box 26099, Milwaukee 53266, WI (e-mail: [email protected])

The authors report no conflict of interest.

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.jorthotrauma.com).

Supported by an intramural research grant from Department of Orthopaedic Surgery at the Medical College of Wisconsin.