1. Departments of Internal Medicine and Dermatology; University of New Mexico; Albuquerque NM USA
2. Department of Epidemiology and Biostatistics; Memorial Sloan-Kettering Cancer Center; New York NY USA
3. Center for Clinical Epidemiology and Biostatistics; Department of Biostatistics and Epidemiology; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
4. School of Public Health; University of Sydney; Sydney NSW Australia
5. Cancercare Ontario; Toronto ON Canada
6. Keck School of Medicine; University of Southern California Norris Comprehensive Cancer Center; University of Southern California; Los Angeles CA USA
7. Department of Epidemiology; University of California; Irvine CA USA
8. Piedmont Tumor Registry; Turin Italy
9. British Columbia Cancer Research Center; Vancouver BC Canada
10. International Agency for Cancer Research; Lyon France
11. Menzies Centre for Population Health; University of Tasmania; Hobart Tas Australia
12. Womens College Hospital; Toronto ON Canada
13. Department of Dermatology; Epidemiology and Lineberger Comprehensive Cancer Center; University of North Carolina; Chapel Hill NC USA