D Fender, Orthopaedic research fellow, W M Harper, Member of steering group, national total hip replacement audit project, P J Gregg, Chairman, national total hip replacement audit project
Alan Tennant, Charterhouse principal research fellowa, Jon Fear, consultant in public health medicineb, Anne Pickering, health research managerb, Micky Hillman, research fellowa, Alison Cutts, senior research fellowa, M A Chamberlain, Charterhouse professor of rheumatological rehabilitation
Urs Müller, senior research fellow in orthopaedic surgery1, Aristomenis Exadaktylos, specialist registrar in anaesthesiology2, Christoph Roeder, clinical research associate1, Markus Pisan, consultant orthopaedic surgeon3, Stefan Eggli, consultant orthopaedic surgeon4, Peter Jüni, senior research fellow in clinical
Philippa C Matthews, specialist registrar infectious diseases/microbiology, clinical research fellow123, Anthony R Berendt, consultant in infectious diseases12, Martin A McNally, consultant orthopaedic surgeon in limb reconstruction1, Ivor Byren, consultant in infectious diseases12
Matthew R Utting, specialist registrar trauma and orthopaedics (mattutting@metronet.co.uk), B J A Lankester, specialist registrar trauma and orthopaedics, L K Smith, research assistant, R F Spencer, consultant orthopaedic surgeon