1 Dept of Traumatology, John Hunter Hospital, Locked Bag 1, Hunter Region Mail Center, Newcastle, NSW, Australia 2310.
2 Assistant Professor, Division of Orthopedic Surgery, University of Toronto, 55 Queen St East, Suite 800, Toronto, Ontario, Canada M5C 1R6.
3 Professor of Orthopedics, 0490 McCaig Tower, Foothills Medical Center 3134 Hospital Dr NW Calgary, Alberta, Canada T2N 5A1. Electronic address: buckclin@ucalgary.ca.