1. Department of Dermatology Pediatric Skin Center University Children's Hospital Zurich Zurich Switzerland
2. Microvascular Diagnostics Royal Free Hospital Institute of Immunity and Transplantation London UK
3. Centre for Rheumatology and Connective Tissue Disease UCL Division of Medicine Royal Free London NHS Foundation Trust London UK
4. Department of Dermatology Great Ormond Street Hospital for Children London UK
5. Centre for Adolescent Rheumatology University College London London UK