1. Hematology-Oncology Unit, Fourth Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Attikon Hospital, Athens, Greece
2. Fourth Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Attikon Hospital, Athens, Greece
3. Rheumatology and Clinical Immunology Unit, Fourth Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Attikon Hospital, Athens, Greece
4. Department of Vascular Surgery, National and Kapodistrian University of Athens, Medical School, Attikon Hospital, Athens, Greece