1. Department of Trauma and Orthopaedic Surgery, Royal London Hospital, Barts Health NHS Trust, London, UK
2. Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
3. Department of Orthopaedics, Massachusetts General Hospital, Boston, Massachusetts, USA
4. Kaplan Joint Center, Department of Orthopaedics, Newton-Wellesley Hospital, Newton, Massachusetts, USA