1. Institute of Microbiology and Biomedical Sciences, Polytechnic University of Marche, Ancona, Italy
2. Department of Technologies and Health, Istituto Superiore di Sanità, Rome, Italy
3. Department of Microbiology and Virology, University of Tromsø, Tromsø, Norway
4. Department of Biology, University of Genoa, Genoa, Italy