First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Dragana, 68100, Alexandroupolis, Greece. Department of Internal Medicine, Evangelismos General Hospital, 45-47 Ipsilantou str, 10676, Athens, Greece. Tisch Cancer Institute Icahn School of Medicine at Mount Sinai, 1190 One Gustave L. Levy Place, New York, NY, 10029, USA. Department of Microbiology, Sismanogleio General Hospital, 1 Sismanogleiou Str, 15126, Athens, Greece. 2nd Department of Critical Care, Medical School, University of Athens, Attikon General University Hospital, 1 Rimini Str, 12462, Athens, Greece. Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias str, 11527, Athens, Greece. madalamaga@med.uoa.gr.