1Musculoskeletal Research Unit, NIHR Wellcome Trust Clinical Research Facility, University Hospital Southampton NHS Foundation Trust, Southampton, UK
2Pierre et Marie Curie University Paris 6, Sorbonne Universités, Pierre Louis Institute of Epidemiology and Public Health, Paris, GRC-08 (EEMOIS)
3APHP, Rheumatology Department, Pitié Salpêtrière Hospital, Paris, F-75013, France
4Division of Rheumatology and Clinical Immunology, Department of Medicine IV, Ludwig-Maximilians- Universität, Munich, Germany
5Department of Rheumatology, Leiden University Medical Center, Leiden, C1-41, The Netherlands
6Rheumatologisches Schwerpunktzentrum, Munich, Germany
✉Correspondence to: Christopher J. Edwards, Musculoskeletal Research Unit, University Hospital Southampton NHS Foundation Trust, Mailpoint 63, G Level, West Wing Southampton General Hospital Southampton, SO16 6YD, UK. E-mail: cedwards@soton.ac.uk
© The Author 2017. Published by Oxford University Press on behalf of the British Society for Rheumatology.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.