1. Institute of Pathology; University of Würzburg; Josef-Schneider-Straße 2 97080 Würzburg Germany
2. Department of Dermatology; University of Würzburg; Josef-Schneider-Straße 2 97080 Würzburg Germany
3. Comprehensive Cancer Center (CCC) Mainfranken; University and University Hospital; Würzburg Germany