1. MRC Biostatistics Unit, University of Cambridge , Cambridge CB2 0SR, United Kingdom
2. Division of Musculoskeletal and Dermatological Sciences, University of Manchester , Manchester M13 9PL, United Kingdom
3. Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London , London EC1M 6BQ, United Kingdom
4. Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, University of Cambridge , Cambridge CB2 0AW, United Kingdom