1. Animal Pathology, Hygiene and Public Health (DIPAV) Department, General Pathology Section, Faculty of Veterinary Medicine, University of Milan, Via Celoria 10, 20133, Milan, Italy
2. Trento Section, Experimental Zooprophylactic Institute, Via Lavisotto 129, Trento, Italy
3. Belluno Section, Experimental Zooprophylactic Institute, Via Cappellari 44/A, 32100, Belluno, Italy