1Royal National Orthopaedic Hospital NHS Trust, Foot & Ankle Unit, Stanmore, United Kingdom
2UCL, Division of Surgery, London, United Kingdom
3Dalhousie University and Queen Elizabeth II Health Sciences Center, Orthopaedics, Halifax, Nova Scotia, Canada,
4St. Michael's Hospital, Division of Orthopaedic Surgery, Toronto, Ontario, Canada
5Dalhousie University and Memorial University of Newfoundland, Orthopaedics, Fredericton, New Brunswick, Canada
6University of Alberta, Orthopaedics, Edmonton, Alberta, Canada
7University of British Columbia, Department of Orthopaedics, Vancouver, Canada
8Northern General Hospital, Foot & Ankle, Sheffield, United Kingdom
9Frimley Park Hospital, Foot & Ankle, Frimley, United Kingdom
10University of Rochester School of Medicine and Dentistry, Department of Orthopaedics, New York, United States