1. Dipartimento di Medicina Veterinaria, Laboratorio di Ispezione degli Alimenti di Origine Animale, University of Perugia, Perugia, Italy
2. Faculty of Veterinary Science, Department of Paraclinical Sciences, University of Pretoria, Onderstepoort, South Africa
3. Department of Chemistry, University of Crete, Heraklion, Greece