1. Infectious Disease Unit, 3rd Department of Pediatrics, Medical Faculty, Aristotle University School of Health Sciences, Hippokration General Hospital, Thessaloniki, Greece
2. Microbiology Department, Hippokration General Hospital, Thessaloniki, Greece
3. Microbiology Department, National and Kapodistrian University School of Medicine, Athens, Greece
4. Infection Control Committee, Hippokration General Hospital, Thessaloniki, Greece
5. Solid Organ Transplantation Department, Medical Faculty, Aristotle University School of Health Sciences, Hippokration General Hospital, Thessaloniki, Greece