Acknowledgements
Arthritis
ARTHRITIS
The authors thank Saba Nayar and David Gardner for histological examination of biopsy samples. F.B. has received funding from Versus Arthritis. B.A.F. has received support from the National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre and the NIHR/Wellcome Trust Birmingham Clinical Research Facility. The views expressed in this publication are those of the authors and not necessarily those of the National Health Service, the NIHR or the Department of Health.