1. Department of Orthopaedic Surgery, University of Toronto, Toronto, ON, Canada
2. Department of Orthopaedic Surgery, One Hospital, Columbia, MO
3. UCSF/SFGH Orthopaedic Trauma Institute, San Francisco, CA
4. Department of Orthopaedic Surgery, St. Louis University Health Science Center, Saint Louis, MO; and
5. University Hospital Trauma Department, Zurich, Switzerland.