1. From the Department of Dermatology and Venereology, University Hospital of Heraklion, Crete, Greece.
2. Department of Dermatology and Venereology, Andreas Sygros Hospital, National and Kapodistrian University of Athens, Medical School of Athens, Athens, Greece.
3. Department of Hemopathology, Evangelismos General Hospital, Athens, Greece.
4. 2nd Department of Dermatology and Venereology, National and Kapodistrian University of Athens, Medical School, “Attikon” General University Hospital, Athens, Greece.
5. Department of Surgery II, Witten/Herdecke University, Witten, Germany.