1 Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK. marc.feldmann@kennedy.ox.ac.uk.
2 Imperial College London, London, UK. ravinder@rnmaini.co.uk.
3 Rheumatology Unit, Internal Medicine Service, Hospital Italiano de Buenos Aires, and Instituto Universitario, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina. enrique.soriano@hospitalitaliano.org.ar.
4 Division of Immunology and Rheumatology, Stanford University, Palo Alto, CA, USA. vstrand@stanford.edu.
5 Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan. tsutake@z5.keio.jp.
6 Saitama Medical School, Saitama, Japan. tsutake@z5.keio.jp.