1. VISAVET Center and Animal Health Department; Veterinary School; Universidad Complutense de Madrid; Madrid Spain
2. Department of Diagnostic Medicine/Pathobiology; College of Veterinary Medicine; Kansas State University; Manhattan KS USA
3. IZS dell'Umbria et delle Marche; Perugia Italy
4. IZS della Sardegna; Centro di Sorveglianza Epidemiologica; Cagliari Italy
5. Parasitología; IRNASA (CSIC); Salamanca Spain