S Siebert MB MRCP T M Lawson PhD MRCP M H Wheeler MD FRCS 1J C Martin MD MRCP 2B D Williams FRCP FRCPath
Department of Rheumatology, University Hospital of Wales, Cardiff 1
Department of Surgery, University Hospital of Wales, Cardiff 2
Department of Rheumatology, Royal Glamorgan Hospital, Llantrisant, Wales