1. Department of Life and Environmental Sciences; University of Cagliari; Cittadella Universitaria di Monserrato SS 554 09042 Monserrato Cagliari Italy
2. Department of Biotechnologies; Chemical and Pharmacy; University of Siena; via Alcide de Gasperi 2 53100 Siena Italy
3. Laboratory for Molecular Virology and Gene Therapy; KU Leuven; 3000 Leuven Flanders Belgium
4. Laboratory of Virology; San Raffaele Hospital; IRCCS; via Olgettina 60 20132 Milano Italy
5. Dipartimento di Chimica e Tecnologie del Farmaco; Università di Roma “La Sapienza”; Piazzale Aldo Moro 5 00185 Roma Italy
6. Department of Department of Biotechnology and Life Sciences; University of Insubria; via Ravasi 2 21100 Varese Italy