Provan, SellaDean, LindaJones, GarethMacfarlane, Gary2021-09-062021-09-062021-09-01Provan, S, Dean, L, Jones, G & Macfarlane, G 2021, 'The changing states of fibromyalgia in patients with axial spondyloarthritis : results from the British Society of Rheumatology Biologics Register for Ankylosing Spondylitis', Rheumatology, vol. 60, no. 9, pp. 4121–4129. https://doi.org/10.1093/rheumatology/keaa8881462-0324ORCID: 0000-0001-5442-902XORCID: /0000-0003-0016-7591/work/90173465ORCID: /0000-0003-2322-3314/work/90172442https://hdl.handle.net/2164/17033We are grateful to the staff of the BSRBR-AS register, Claudia Zabke, Elizabeth Ferguson-Jones, Maureen Heddle, Nafeesa Nazlee and Barry Morris, and to the recruiting staff at the clinical centres, details of which are available at: https://www.abdn.ac.uk/iahs/research/epidemiology/spondyloarthritis.php#panel1011. The BSRBR-AS is funded by the British Society for Rheumatology, who have received funding for this from Pfizer, AbbVie and UCB. These companies receive advance copies of manuscripts for comments but made none in relation to this manuscript. They have no input in determining the topics for analysis or work involved in undertaking it. SP received a travel grant from the South Eastern Health Authority of Norway. SP had the idea for the study and with GJM planned the analysis. SP undertook the analysis and drafted the manuscript. The results were discussed by all authors, who also commented on the draft manuscript. Funding: No specific funding was received from any funding agency in the public, commercial or not-for-profit sectors to carry out the work described in this article.9267371engspondyloarthritisfibromyalgiatrajectoriesdisease activityR MedicineOtherSupplementary DataRJournal article10.1093/rheumatology/keaa888609