1 Department of Dermatology, Netherlands Cancer Institute, Amsterdam, The Netherlands.
2 Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands.
3 Melanoma Unit, Dermatology Department, Hospital Clínic de Barcelona, IDIBAPS, Universitat de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Barcelona, Spain.
4 Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands. Electronic address: [email protected].