1. Department of Internal Medicine, Evangelismos General Hospital, 45-47 Ipsilantou Street, 10676 Athens, Greece
2. First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, 68100 Alexandroupolis, Greece
3. Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, 11527 Athens, Greece
4. Department of Microbiology, Sismanogleio General Hospital, 1 Sismanogleiou Street, 15126 Athens, Greece
5. Roche Hellas Diagnostics S.A., 18-20 Amarousiou-Chalandriou Street, 15125 Athens, Greece
6. 2nd Department of Critical Care, Medical School, University of Athens, Attikon General University Hospital, 1 Rimini Street, 12462 Athens, Greece