1 Institute of Infection and Immunity, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom.
2 Department of Life, Health and Environmental Sciences, Internal Medicine and Nephrology Division, University of L'Aquila, L'Aquila, Italy.
3 Department of Rheumatology, London North West University Healthcare NHS Trust, London, United Kingdom; Centre for Rheumatology & Department of Neuromuscular Diseases, University College London, London, United Kingdom; National Institute for Health Research (NIHR) University College London Hospitals (UCLH) Biomedical Research Centre (BRC), University College London Hospitals (UCLH) NHS Foundation Trust, London, United Kingdom. Electronic address: p.machado@ucl.ac.uk.