1. Division of Infectious Diseases; School of Medicine; University of Patras; Patras Greece
2. Environmental Microbiology Unit; Department of Hygiene; School of Medicine; University of Patras; Patras Greece
3. Department of Microbiology; School of Medicine; University of Patras; Patras Greece
4. Department of Anaesthesiology and Intensive Care Medicine; School of Medicine; University of Patras; Patras Greece
5. Intensive Care Unit; General Hospital ‘Saint Andrew’; Patras Greece
6. Department of Microbiology; School of Medicine; University of Thessalia; Larissa Greece