1. Private practice; Warren, New Jersey
2. 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, IDIBAPS; Barcelona; Spain
5. Department of Dermatology; Paracelsus Private Medical University; Salzburg; Austria
6. Department of Dermatology; Zurich; Switzerland