1. Department of Pathology and Diagnostics, Section of Immunology, University of Verona, Verona, Italy
2. Current address: Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
3. Department of Pathology and Diagnostics, Section of Pathology, University of Verona, Verona Italy
4. Current address: Department of Pathology, Pederzoli Hospital, Verona, Italy
5. Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
6. Department of Physiological Chemistry, University of Veterinary Medicine of Hannover, Hannover, Germany
7. Department of Diagnostic Pathology, Azienda Ospedaliera Universitaria Integrata, Verona, Italy