1. Futuravet Veterinary Referral Center, 62029 Tolentino, Italy
2. Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche ‘Togo Rosati’, Via G. Salvemini, 1, 06126 Perugia, Italy
3. Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy