1Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield Foot & Ankle Unit, Sheffield, United Kingdom
2St Michaels Hospital, Division of Orthopaedic Surgery, Toronto, Canada
3Dalhousie University and Queen Elizabeth II Health Sciences Center, Dept of Orthopaedic Surgery, Halifax, Canada
4University of Rochester School of Medicine and Dentistry, Department of Orthopaedics, Rochester, United States
5University of British Columbia, Department of Orthopaedics, Vancouver, Canada
6University of Calgary, Department of Orthopaedics, Calgary, Canada
7University of Alberta, Department of Orthopaedics, Edmonton, Canada