1 Departments of Physical Medicine and Rehabilitation (N.B.J., B.J.S., and K.R.A.) and Orthopaedics (N.B.J. and K.R.A.) and Division of Epidemiology (N.B.J.), Vanderbilt University Medical Center, Nashville, Tennessee.
2 Emirates Hospitals Group, Integra Medical and Surgical Center, Dubai, United Arab Emirates.
3 Department of Orthopaedics, Rehabilitation, and Podiatry, Ft. Belvoir Community Hospital, Ft. Belvoir, Virginia.
4 Department of Orthopaedics, University of Kentucky, Lexington, Kentucky.