1. Faculty of Medicine, Biomedical Center, Charles University, Pilsen, Czech Republic
2. Unit of Microbiology and Clinical Microbiology, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
3. Istituto Superiore di Sanità, Rome, Italy
4. S. Agostino-Estense-Baggiovara Hospital, Modena, Italy
5. Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy