1 Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester NIHR Biomedical Research Centre, The University of Manchester, Manchester, M6 8HD, UK.
2 National Institute for Health Research, Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, The University of Manchester, Manchester, UK.
3 Department of Rheumatology, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Salford, UK.
4 Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.
5 Affinity Biomarker Labs, Translation & Innovation Hub Building, Imperial College London White City Campus, London, W12 0BZ, UK.