1. Infectious Diseases Laboratory, 4th Department of Internal Medicine, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
2. 6th Department of Internal Medicine, Hygeia General Hospital, Athens, Greece
3. Microbiology Laboratory, Hygeia General Hospital, Athens, Greece
4. Department of Clinical Bacteriology, Parasitology, Zoonoses and Geographical Medicine, University Hospital of Heraklion, Heraklion, Greece
5. Microbiology Department, KAT Hospital, Athens, Greece
6. Cancer Hospital of Thessaloniki ‘THEAGENEIO’, Thessaloniki, Greece
7. Microbiological Laboratories, Bacteriology Department ‘G. Papanikolaou’ General Hospital of Thessaloniki, Thessaloniki, Greece
8. Department of Clinical Μicrobiology, Thriassio General Hospital, Elefsina, Athens, Greece
9. Department of Microbiology, Hippokration Athens General Hospital, Athens, Greece
10. Microbiology Laboratory, General Hospital of Athens ‘G. Gennimatas’, Athens, Greece
11. Athens Naval Hospital, Athens, Greece
12. Microbiology Laboratory, General Hospital of Corfu, Corfu, Greece
13. Department of Microbiology, General Hospital of Thessaloniki ‘G. Gennimatas’, Thessaloniki, Greece
14. Department of Microbiology, General Hospital of Lamia, Lamia, Greece
15. Department of Microbiology, University Hospital of Larissa, Larissa, Greece
16. Department of Microbiology, St Savvas Cancer Hospital, Athens, Greece