1. Division of Reconstructive Orthopaedics, Department of Orthopaedics—Faculty of Medicine, University of British Columbia, Vancouver, B.C., Canada
2. Department of Radiology—Faculty of Medicine, University of British Columbia, Vancouver, B.C., Canada
3. Department of Orthopaedics, University of British Columbia
4. St. Paul's Hospital Department of Radiology, Vancouver, B.C