1. Department of Paediatric Dermatology, St John’s Institute of Dermatology, King’s College London and Guy’s and St Thomas’ NHS Foundation Trust , London , UK
2. Clinical Medicine, Trinity College , Dublin , Ireland
3. Department of Infection, Immunity & Cardiovascular Disease, Sheffield Dermatology Research, University of Sheffield , Sheffield , UK
4. Sheffield Children’s Hospital , Sheffield , UK
5. Department of Dermatology, Oregon Health and Science University , Portland, OR , USA
6. Department of Dermatology and Allergy, Ludwig-Maximilian University , Munich , Germany
7. Department of Dermatology, Free University Brussels, University Hospital , Brussels , Belgium
8. Aarhus University Hospital , Aarhus , Denmark
9. Sanofi, Cambridge, MA , USA
10. Regeneron Pharmaceuticals Inc. , Tarrytown, NY , USA