1. Department of Medicine, Centre for Cardiometabolic and Vascular Science, University College London, United Kingdom (L.C., K.E.W., E.C., I.P.-T.).
2. Centre for Rheumatology Research (L.C., K.E.W., G.A.R., E.C., T.M., F.F., J.P., P.D., E.S., S.C., J.B., A.R., E.C.J.), University College London, United Kingdom.
3. Department of Medicine, Centre for Adolescent Rheumatology Versus Arthritis (G.A.R., J.P.), University College London, United Kingdom.
4. Scicross AB, Skövde, Sweden (P.D.).
5. Vascular Screening and Diagnostic Centre, London, United Kingdom (M.G., A.N.).
6. St Georges London/Nicosia Medical School, University of Nicosia, Cyprus (A.N.).