1. Department of Veterinary Sciences; University of Trás-os-Montes and Alto Douro; Vila Real Portugal
2. Hospital Veterinário Berna; Lisboa Portugal
3. Centro Oncologico Veterinario; Bologna Italy
4. Center for the Study of Animal Sciences, CECA-ICETA; University of Porto; Porto Portugal
5. Center for Research and Technology of Agro-Environment and Biological Sciences (CITAB); University of Trás-os-Montes and Alto Douro; Vila Real Portugal