1. Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
2. Department of Orthopaedics, University of Gothenburg, Gothenburg, Sweden
3. Royal College of Surgeons in Ireland, Bahrain
4. Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
5. Nirschl Orthopaedic Center, Arlington, VA, USA
6. Department of Orthopaedic Surgery, Santa Casa de São Paulo School of Medical Sciences, São Paulo, Brazil