1 Center for Dermatooncology, Department of Dermatology, Liebermeisterstrasse 25, University Hospital Tübingen, 72076 Tübingen, Germany; ; Portuguese Air Force Health Direction, Paço do Lumiar, 1649-020 Lisbon, Portugal.
2 Center for Dermatooncology, Department of Dermatology, Liebermeisterstrasse 25, University Hospital Tübingen, 72076 Tübingen, Germany.