1. National Cancer Registration and Analysis Service, Public Health England, Wellington House, London, United Kingdom
2. International Prevention Research Institute, Lyon, France
3. Department of Dermatology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
4. London School of Hygiene and Tropical Medicine, London, United Kingdom
5. Blizard Institute, Barts and The London School of Medicine and Dentistry, London, United Kingdom
6. Department of Dermatology, School of Medicine, University of Dundee, Dundee, Scotland
7. Barts and The London School of Medicine and Dentistry, London, United Kingdom