1. Department of Paediatric Nephrology, Alder Hey Children’s NHS Foundation Trust Hospital, Liverpool, UK
2. Department of Women’s & Children’s Health, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
3. Department of Paediatric Rheumatology, Alder Hey Children’s NHS Foundation Trust Hospital, Liverpool, UK
4. Department of Pediatric Histopathology, Cincinnati Children’s Hospital Medical Centre, Cincinnati, USA
5. Department of Histopathology, Southmead Hospital, Bristol, UK
6. Department of Paediatric Histopathology, Great Ormond Street Hospital, London, UK
7. Department of Pediatric Rheumatology, Cincinnati Children’s Hospital Medical Centre, Cincinnati, USA
8. Department of Paediatric Histopathology, Alder Hey Children’s NHS Foundation Trust Hospital, Liverpool, UK
9. Centre for Biostatistical Services, University of Cincinnati College of Medicine, Cincinnati, USA