1. Animal Pathology Department, Veterinary Faculty, Zaragoza University, Zaragoza, Spain
2. Clinical Immunology Laboratory, Veterinary Faculty, Zaragoza University, Zaragoza, Spain
3. Aragon Agroalimentary Institute-IA2, Zaragoza University-CITA, Zaragoza, Spain
4. FIEB Foundation (Fundación para la Investigación en etología y biodiversidad), Toledo, Spain
5. Department of Animal Medicine and Surgery, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
6. Department of Anatomy, Embryology and Animal Genetic, Veterinary Faculty, Zaragoza University, Zaragoza, Spain