1. 4th Department of Internal Medicine; Medical School, National and Kapodistrian University of Athens; Athens Greece
2. 1st Department of Critical Care Medicine; Medical School, National and Kapodistrian University of Athens; Athens Greece
3. Department of Medical Laboratories, Molecular Microbiology Laboratory; Technological Institution of Athens; Athens Greece
4. 2nd Department of Critical Care Medicine; Medical School, National and Kapodistrian University of Athens; Athens Greece