1. Department of Dermatology; University Hospital Birmingham; Birmingham U.K
2. Stanford Cancer Centre & School of Medicine; Stanford CA U.S.A
3. Department of Dermatology; Guy's and St Thomas' NHS Trust; London U.K
4. Department of Dermatology; University of Wisconsin and Middleton VA Medical Center; Madison WI U.S.A
5. Department of Dermatology; Leiden University Medical Centre; Leiden the Netherlands
6. Peter MacCallum Cancer Centre and University of Melbourne; Melbourne VIC Australia
7. Department of Medical Sciences; Dermatologic Clinic; University of Torino; Turin Italy