1. Dermatologic Clinic University of Turin Medical School Turin Italy
2. Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne VIC Australia
3. Christie Hospital Manchester UK
4. Leiden University Medical Centre Leiden the Netherlands
5. Athens University Medical School Athens Greece
6. Hospital St Louis Paris France
7. Hospital Universitari de Bellvitge Barcelona Spain
8. University of Milano Milan Italy
9. University Hospital Zurich Zurich Switzerland
10. Johannes Wesling University Medical Centre Minden Germany
11. City of Hope National Medical Center and Beckman Research Institute Duarte CA USA
12. Belgium University Hospitals Leuven Leuven Belgium
13. Rabin Medical Center Tel Aviv University Tel Aviv Israel
14. Aristotle University of Thessaloniki in Papageorgiou General Hospital Thessaloniki Greece
15. University of São Paulo Medical School São Paulo SP Brazil
16. Cancer Epidemiology Unit Department of Medical Sciences University of Turin Turin Italy
17. University Hospitals Birmingham Birmingham UK
18. University Hospital Schleswig‐Holstein Campus Kiel Kiel Germany
19. Semmelweis University Budapest Hungary
20. HELIOS Klinikum Hildesheim GmbH University Medical Center Göttingen Göttingen Germany
21. University of Pittsburgh School of Medicine Pittsburgh PA USA
22. Hospital 12 de Octubre Madrid Spain
23. Hospital Clinico University of Barcelona Barcelona Spain
24. Helsinki University Central Hospital Helsinki Finland
25. Hospital Italiano De Buenos Aires Buenos Aires Argentina
26. University Hospital Wuerzburg Wuerzburg Germany
27. Poole Hospital Poole UK
28. Department of Dermatology Medical University of Vienna Vienna Austria
29. Churchill Hospital Oxford University Hospitals NHS Foundation Trust Oxford UK
30. Torbay Hospital Torbay UK
31. University Hospital Southampton Southampton UK
32. Stanford University Stanford CA USA
33. Department of Dermatology, Research Unit Dermatopathology Medical University of Graz Graz Austria
34. Kempf und Pfaltz Histologische Diagnostik Zurich Switzerland
35. Kings College London Guy's and St Thomas’ NHS Foundation Trust London UK
36. European Co‐ordinating PROCLIPI Centre for PROCLIPI University Hospitals Birmingham Birmingham UK