1. Department of Dermatology, University Hospital of Basel , Burgfelderstrasse 101, 4055 Basel , Switzerland
2. Department of Dermatology , Dermatopathology Training Center, , Schönbeinstrasse 40, 4031 Basel , Switzerland
3. University Hospital Basel , Dermatopathology Training Center, , Schönbeinstrasse 40, 4031 Basel , Switzerland
4. Institute of Medical Genetics and Pathology, University Hospital Basel , Schönbeinstrasse 40, 4031 Basel , Switzerland