1. Institute of Pathology; Medical Faculty University of Ljubljana; Ljubljana Slovenia
2. Division of Dermatology; East Carolina University; Greenville NC USA
3. Imperial College Hospitals NHS Trust; London UK
4. Department of Histopathology and Sarcoma Unit; The Royal Marsden NHS Foundation Trust; London UK
5. Department of Dermatopathology; St John's Institute of Dermatology; St Thomas’ Hospital; London UK