1. Department of Paediatric Dermatology; Great Ormond Street Hospital for Children; London U.K.
2. Royal Hospital for Children; Glasgow U.K.
3. Queen Alexandra Hospital; Portsmouth U.K.
4. Chapel Allerton Hospital; Leeds Teaching Hospitals NHS Trust; Leeds U.K.
5. Birmingham Children's Hospital; Birmingham U.K.
6. Paediatric Cardiology Division; Great Ormond Street Hospital for Children; London U.K.
7. Leicester Royal Infirmary; Leicester U.K.
8. Department of Paediatric Otolaryngology; Great Ormond Street Hospital for Children; London U.K.
9. Chelsea and Westminster Hospital; London U.K.
10. London School of Hygiene and Tropical Medicine; London U.K.
11. Sheffield Teaching Hospitals; Sheffield U.K.
12. The Royal Free London Hospital; London U.K.
13. Nottingham Children's Hospital; London U.K.
14. Derby Hospitals; Derby U.K.
15. Unit of Population-Based Dermatology Research and Department of Paediatric Dermatology; St John's Institute of Dermatology; Guy's and St Thomas’ NHS Foundation Trust and King's College London; London U.K.