1 Faculty of Veterinary Medicine, University of Teramo, Campus Coste Sant'Agostino, Renato Balzarini Street, 1, 64100, Teramo, Italy.
2 Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Campus Coste Sant'Agostino, Renato Balzarini Street, 1, 64100, Teramo, Italy.
3 Faculty of Veterinary Medicine, University of Teramo, Campus Coste Sant'Agostino, Renato Balzarini Street, 1, 64100, Teramo, Italy. Electronic address: ploi@unite.it.