1. Unit of Pathology, Department of Veterinary Medicine and Animal Production, University of Naples Federico II, 80137 Naples, Italy
2. Unit of Forensic Veterinary Medicine, Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, 80055 Naples, Italy
3. National Reference Centre for Veterinary Forensic Medicine, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, 58100 Grosseto, Italy
4. Department of Pharmacy, University of Salerno, 84084 Salerno, Italy