1. Section of Veterinary Pathology, Department of Veterinary Pathology, Hygiene and Public Health, University of Milan, via Celoria 10, 20133 Milan, Italy
2. Clinica Veterinaria Basiglio, p.za Monsignor Rossi 14, 20080 Basiglio, Milan, Italy
3. via P. Revelli Beaumont 43, 16143 Genova, Italy