Affiliation: | 1. Division of Rheumatology, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Canada 4. German Center for Paediatric and Adolescent Rheumatology, Garmisch-Partenkirchen, Germany 3. Department of Medical Imaging, University of Toronto, Toronto, Canada 2. Division of Nephrology, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Canada 5. Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Canada 6. Section of Rheumatology, Department of Paediatrics, Alberta Children’s Hospital, University of Alberta, 2888 Shaganappi Trail, Calgary, T3B 2A8, Canada
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