1. Unit of Veterinary Histology and Pathology, University Institute of Animal Health and Food Safety (IUSA), Veterinary School, University of Las Palmas de Gran Canaria, Trasmontaña S/N, 35413, Canary Islands, Spain
2. VISAVET Health Surveillance Centre, Complutense University of Madrid, Avenida Puerta de Hierro, s/n 28040, Madrid, Spain