1. Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy
2. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
3. Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy. Domenico.ventrella2@unibo.it
4. Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy