1 Department of Rheumatology, St Peter's Hospital, Chertsey, Surrey, St George's Hospital Medical School, London, Department of Rheumatology, Defence Medical Rehabilitation Unit, Headley Court, Surrey, Department of Rheumatology, Addenbrooke's Hospital, Cambridge, Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Headley Court, Epsom, Surrey and Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK.
2 Department of Rheumatology, St Peter's Hospital, Chertsey, Surrey, St George's Hospital Medical School, London, Department of Rheumatology, Defence Medical Rehabilitation Unit, Headley Court, Surrey, Department of Rheumatology, Addenbrooke's Hospital, Cambridge, Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Headley Court, Epsom, Surrey and Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK. Department of Rheumatology, St Peter's Hospital, Chertsey, Surrey, St George's Hospital Medical School, London, Department of Rheumatology, Defence Medical Rehabilitation Unit, Headley Court, Surrey, Department of Rheumatology, Addenbrooke's Hospital, Cambridge, Academic Department of Military Rehabilitation, Defence Medical Rehabilitation Centre Headley Court, Epsom, Surrey and Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK. alexander.n.bennett@btinternet.com.