1. Department of Veterinary Medicine, University of Bari “Aldo Moro”, Bari, Italy
2. Department of Science of Agriculture, Food and Environment, University of Foggia, Foggia, Italy
3. Department of Poultry Diseases with Clinic, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
4. Department of Veterinary Public Health, Faculty of Veterinary Medicine, Agriculture University of Tirana, Tirana, Albania