1 Department of Paediatric Nephrology, Evelina London Children's Hospital, King's College London, London, UK.
2 Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK.
3 Evelina Children's Hospital, London, UK.
4 Department of Paediatric Dermatology, St John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK.
5 Royal Hospital for Children NHS Trust, Glasgow, UK.
6 Paediatric Dermatology, Children's Health Ireland at Crumlin, Dublin, Ireland.
7 Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK.
8 University Hospitals Coventry and Warwickshire, Coventry, UK.
9 Ninewells Hospital and Medical School, Dundee, UK.
10 Whittington Hospital, Whittington Health NHS Trust, London, UK.
11 Sheffield Children's NHS Foundation Trust and Sheffield Dermatology Research, Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK.
12 University Hospitals Dorset NHS Foundation Trust, Poole, UK.
13 Birmingham Children's Hospital, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK.
14 Oxford University Hospitals NHS Foundation Trust, Oxford, UK.
15 Department of Dermatology, Belfast Health and Social Care Trust, Belfast, UK.
16 Nottingham University Hospitals NHS Trust, Nottingham, UK.
17 Bristol Royal Hospital for Children, Bristol, UK.
18 Royal Free Hospital and Blizard Institute, Queen Mary University London, UK.
19 Health Economics Group, Norwich Medical School, University of East Anglia, Norwich, UK.
20 Institute of Pharmaceutical Science, King's College London, London, UK.
21 21 Clinical Medicine, Trinity College Dublin, Ireland.
22 National Children's Research Centre, Crumlin, Dublin Ireland.