Edited by Susan Alexander PhD MRCS Specialist Orthopaedic Registrar, Chelsea & Westminster Hospital, London, UK, Lars Neumann FRCS (Edin) Consultant Orthopaedic Surgeon, Nottingham Shoulder and Elbow Unit, Nottingham University Hospitals, Nottingham, UK, Andrew Wallace PhD FRACS (Orth) Consultant Orthopaedic Surgeon, The Shoulder Unit, The Hospital of St. John & St. Elizabeth, London, UK