1. Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY, USA
2. Educational Program Development, AO Foundation–AO Education, Duebendorf, Switzerland
3. Department of Orthopaedics and Traumatology, Queen Mary Hospital, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong SAR, People's Republic of China
4. Department of Trauma Surgery and Sports Medicine, Medical University of Innsbruck, Innsbruck, Austria