1. 4th Department of Internal Medicine, National and Kapodistrian University of Athens School of Medicine, Attikon University General Hospital , Chaidari, Greece
2. Clinical Microbiology Laboratory, National and Kapodistrian University of Athens School of Medicine, Attikon University General Hospital , Chaidari, Greece
3. Clinical Immunology-Rheumatology Unit, 4th Department of Internal Medicine, National and Kapodistrian University of Athens School of Medicine, Attikon University General Hospital , Chaidari, Greece
4. Clinical Immunology-Rheumatology Unit, 2nd Department of Medicine and Laboratory, National and Kapodistrian University of Athens School of Medicine, Hippokration General Hospital , Athens, Greece