1. Department of Pathophysiology, Laikon General Hospital and School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
2. First Department of Propedeutic Medicine, Laikon General Hospital and School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Hygiene and Epidemiology, Laikon General Hospital and School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
4. Laboratory of Immunology, Laikon General Hospital and School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
5. Department of Pathophysiology, Laikon General Hospital and School of Medicine, National and Kapodistrian University of Athens, Athens, Greece