1. Institute of Hygiene; Catholic University of Sacred Heart; 00168 Rome Italy
2. Department of Hygiene; University of Modena and Reggio Emilia; 41100 Modena Italy
3. Hygiene Laboratory, Department of Human Movement and Sport Sciences; University Institute for Movement Sciences; 00194 Rome Italy
4. Hospital Head Unit; Catholic University of Sacred Heart; 00168 Rome Italy
5. Institute of Microbiology; Catholic University of Sacred Heart; 00168 Rome Italy
6. Institute of Infectious Diseases; Catholic University of Sacred Heart; 00168 Rome Italy