1. Skin Tumour Unit; St John's Institute of Dermatology; London UK
2. Department of Dermatology; Dorset County Hospital NHS Foundation Trust; Dorchester UK
3. Pathology Department; Nottingham University Hospitals NHS Trust; Nottingham UK
4. Department of Oncology; Derby Hospitals NHS Foundation Trust; Derby UK
5. Department of Dermatology; Medical University of Graz; Graz Austria
6. Department of Dermatology; University Hospital; Zurich Switzerland
7. Department of Pathology; University of Dijon; Dijon France
8. Dermatopathology Department, St John's Institute of Dermatology; Guy's & St Thomas' NHS Foundation Trust; London UK