1. Department of Dermatology; University of Medicine and Dentistry of New Jersey; New Brunswick; New Jersey
2. Dermatology Service, Memorial Sloan Kettering Cancer Center; Hauppauge; New York
3. Divison of Dermatology; Medical University of Graz; Graz; Austria
4. Department of Dermatology; Melanoma Unit; Hospital Clinic i Provincial de Barcelona; Institut d'Investigacions Biomèdiques August Pi i Sunyer; Barcelona; Spain
5. Department of Dermatology; University Hospital, Zurich; Switzerland