1. St John's Institute of Dermatology; London UK
2. Department of Dermatology; Stanford University; Stanford CA USA
3. Division of Health and Social Care Research; Kings College London; London UK
4. Department of Pathology; UCSF; San Francisco CA USA
5. Department of Dermatology; Boston University Medical Center; Boston MA USA
6. Department of Pathology; Stanford University; Stanford CA USA
7. Dermatopathology Department; Yale University School of Medicine; New Haven CT USA
8. Lake Diagnostics Florida; Lake City FL USA
9. Department of Dermatology; University Hospital Zurich; Zurich Switzerland
10. Department of Dermatology; Medical College of Wisconsin; Milwaukee WI USA
11. Dundee Cancer Centre; Ninewells Hospital and Medical School; Dundee UK