1. Department of Trauma and Orthopaedics, The University of Edinburgh, Edinburgh, UK
2. Borgess Orthopaedics, Kalamazoo, Michigan, USA
3. Santa Monica Orthopaedic Group, Los Angeles, California, USA
4. Department of Sport and Exercise, University of Edinburgh, Edinburgh, and, European Tour Golf, Wentworth Drive, Virginia Water, GU25 4LX, UK
5. David Geffen School of Medicine, University of California, Los Angeles, USA
6. Department of Orthopaedics, University of Edinburgh, Edinburgh, UK
7. Steadman Philippon Research Institute, Vail, Colorado, USA