1. Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine; University of Cordoba; Cordoba; Spain
2. Centro Militar de Cría Caballar de Ecija; Cría Caballar de las F.A.S; Sevilla; Ecija; Spain
3. Department of Cell Biology, Physiology and Immunology, Faculty of Veterinary Medicine; University of Cordoba; Cordoba; Spain