1. Retrovirus Center, Virology Section, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
2. Laboratory of Viral Zoonotics, Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
3. Department of Medicine and Surgery, University of Insubria, Varese, Italy
4. Virology Unit, Pisa University Hospital, Pisa, Italy
5. National Institute of Health, Rome, Italy
6. Pharmacology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
7. Hematology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
8. Laboratory of Virology, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
9. Pasteur Institute-Cenci Bolognetti Foundation, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy