1. Department of Musculoskeletal Radiology, Leeds Teaching Hospitals, Leeds, United Kingdom
2. Department of Musculoskeletal Radiology, Royal Orthopedic Hospital, Birmingham, United Kingdom
3. Department of Radiology, Aintree University Hospital, Fazakerley, Liverpool, United Kingdom
4. Department of Radiology, St Helens and Knowsley Teaching Hospitals NHS Trust, United Kingdom,