1. Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900 Lodi, Italy
2. Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy
3. Department of Human Science and Promotion of Quality Life, San Raffaele Telematic University, 00166 Rome, Italy
4. Laboratorio di Malattie Infettive degli Animali (MiLab), University of Milan, 26900 Lodi, Italy
5. Department of Veterinary Sciences, University of Turin, 10095 Turin, Italy