1. Hygiene Unit, San Martino Policlinico Hospital – IRCCS for Oncology and Neurosciences, Genoa, Italy
2. Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy
3. Interuniversity Research Centre on Influenza and Other Transmissible Infections (CIRI-IT), Genoa, Italy
4. Interdisciplinary Department of Medicine, University of Bari, Bari, Italy
5. Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
6. Sant’Andrea Hospital, University La Sapienza, Rome, Italy
7. Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy