1. Department of Pathology, University Hospital Campus Bio-Medico, Rome, Italy;
2. Sikl's Department of Pathology, Medical Faculty in Pilsen, Charles University in Prague, Pilsen, Czech Republic; and
3. Bioptical Laboratory, Pilsen, Czech Republic;
4. Department of Dermatology, Universisty Hospital, Zurich, Switzerland;
5. IDP Institut für Dermatohistopathologie, Pathologie Institut Enge, Zürich, Switzerland.