1. Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Córdoba University, Campus de Rabanales, Edificio de Sanidad Animal, Córdoba, Spain.
2. Centro de Investigación en Sanidad Animal-Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (CISA-INIA), Valdeolmos, Madrid Spain.
3. Department of Anatomy and Comparative Pathology, Faculty of Veterinary Medicine, Murcia University, Campus de Espinardo, Murcia, Spain.