1. Department of Medicine, Divisions of Dermatology and Oncology, Duke University Medical Center, Durham, NC;
2. Department of Dermatology, Johns Hopkins University, Baltimore, MD;
3. Department of Dermatological Sciences, University of Florence, Florence, Italy;
4. Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands;
5. Department of Dermatology, Stanford University Medical Center, Stanford, CA;
6. Department of Dermatology, University of Vienna, Vienna, Austria;
7. Department of Dermatology, University of California at San Francisco;
8. Department of Dermatology, University of Texas at Houston;
9. Department of Dermatology, University of Barcelona, Barcelona, Spain;
10. Department of Dermatology, University of Wisconsin, Madison;
11. Department of Dermatology, University Hospital Zurich, Zurich, Switzerland;
12. Department of Dermatology and Venereal Diseases, Helsinki University Hospital, Helsinki, Finland;
13. Department of Dermatology, Yale University, New Haven, CT;
14. Department of Dermatology, Mayo Clinic, Rochester, MN;
15. Department of Dermatology, University of Turin, Turin, Italy;
16. Department of Dermatology, Charité, Humboldt University, Berlin, Germany;
17. Department of Immuno-Dermatology, Hospital Avicenne–University of Paris XIII, Paris, France;
18. St John's Institute of Dermatology, Skin Tumour Unit, St Thomas' Hospital, London, United Kingdom