1 Department of Paediatric Rheumatology, University Hospitals Bristol NHS Foundation Trust, Bristol BS2 8BJ, UK.
2 Pädiatrische Rheumatologie, Klinik und Poliklinik für Kinder und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
3 Department of Paediatric and Adolescent Rheumatology, Children's Health Ireland at Crumlin, Dublin, Ireland.
4 Department of Radiology, University Hospitals Bristol NHS Foundation Trust, Bristol BS2 8BJ, UK.
5 Department of Paediatric Rheumatology, Alder Hey Children's NHS Foundation Trust Hospital, Liverpool, UK.
6 Department of Paediatric Rheumatology, Alder Hey Children's NHS Foundation Trust Hospital, Liverpool, UK; Department of Women's and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK.
7 Department of Paediatric Rheumatology, University Hospitals Bristol NHS Foundation Trust, Bristol BS2 8BJ, UK; Translational Health Sciences, University of Bristol, Bristol, UK. Electronic address: avramanan@hotmail.com.