1. 1 Department of Microbiology, G.Gennimatas General Hospital, Thessaloniki, Greece
2. 2 3rd Department of Pediatrics, Hippokration Hospital, Aristotle University, Thessaloniki, Greece
3. 3 ICU, G. Gennimatas General Hospital, Thessaloniki, Greece
4. 4 Department of Microbiology, Medical School, University of Thessaly, Larissa, Greece
5. 5 1st Internal Medicine Department, Infectious Diseases Division, AHEPA Hospital, Medical School, Aristotle University of Thessaloniki, Greece
6. 6 Department of Microbiology, National School of Public Health, Greece
7. 7 Department of Microbiology, Aristotle University of Thessaloniki Medical School, Thessaloniki, Greece