1. Department of Chemistry and Technology
of Drugs, University of Perugia, 06123 Perugia, Italy
2. Department of Molecular Medicine, University of Padua, 35121 Padua, Italy
3. Department
of Chemistry, Biology, and Biotechnology, University of Perugia, 06123 Perugia, Italy
4. Department of Infectious, Parasitic, and Immunomediated Diseases,
WHO National Influenza Centre, Istituto Superiore di Sanità (ISS), Rome, Italy