1 University of Buckingham Medical School, Buckingham, United Kingdom. Electronic address: [email protected].
2 Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
3 Department of Plastic Surgery, Stoke Mandeville Hospital, Buckinghamshire Healthcare NHS trust, United Kingdom; Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom.