1. Department of Histology and Pathological Anatomy, Veterinary Faculty; University of Las Palmas de Gran Canaria; c/Francisco Inglott Artiles 12A 35016 Las Palmas de Gran Canaria Spain
2. Department of Pathological Anatomy, Veterinary Faculty; University of Córdoba, Avda; Medina Azahara s/n 14005 Córdoba Spain