1. Department. of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
2. Università Cattolica del Sacro Cuore, Largo F. Vito, 1, 00168 Rome, Italy
3. Departmentt. of Clinical Microbiology, G. Gennimatas General Hospital, 154 Avenue Mesogeion, 11527, Athens, Greece
4. Department of Genetics and Biotechnology, Faculty of Biology, National Kapodistrian University of Athens, Avenue oulof Palme, Ano Ilisia 15784, Athens, Greece