1. Department of Dermatology, The Royal London Hospital , London, UK
2. Barts and The London School of Medicine and Dentistry, Queen Mary University of London , London, UK
3. Department of Dermatology, University College London Hospitals NHS Foundation Trust, London, UK
4. Hospital for Tropical Diseases, University College London Hospitals NHS Foundation Trust , London, UK
5. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine , London , UK