1. Department of Dermatology; Chelsea and Westminster Hospital NHS Foundation Trust; Chelsea and Westminster Hospital; 369 Fulham Road London SW10 9NH UK
2. Department of Dermatology; Lewisham and Greenwich NHS Trust; University Hospital Lewisham; High Street Lewisham SE13 6LH UK
3. Department of Pathology; University College London Hospitals NHS Foundation Trust; University College Hospital London; 250 Euston Road 3 Floor Central Wing London NW1 2PG UK
4. Department of Urology and NIHR Biomedical Research Centre; University College London Hospitals NHS Foundation Trust; 250 Euston Road 3 Floor Central Wing London NW1 2PG UK
5. Department of Dermatology; University College London Hospitals NHS Foundation Trust; University College Hospital London; 250 Euston Road 3 Floor Central Wing London NW1 2PG UK