1. Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900 Lodi, Italy
2. Department of Humanities and Social Sciences, University of Sassari, 07100 Sassari, Italy
3. Escuela de Graduados, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia 5090000, Chile
4. Laboratory of Infectious Diseases of Domestic Animals (MiLab), University of Milan, 26900 Lodi, Italy