1. Hematology Oncology Unit, 4th Department of Internal Medicine, Attikon University Hospital, National & Kapodistrian University of Athens, Greece
2. 2nd Department of Dermatology & Venereology, Attikon University Hospital, National & Kapodistrian University of Athens, Greece
3. Rheumatology Unit, 4th Department of Internal Medicine, Attikon University Hospital, National & Kapodistrian University of Athens, Greece