1. Department of Histology and Pathology; Veteriniary Faculty ULPGC; Trasmontana s/n 35416 Arucas Las Palmas Spain
2. Department of Infectious Diseases; Veteriniary Faculty ULPGC; Trasmontana s/n 35416 Arucas Las Palmas Spain
3. Department of Small Animal Clinical Sciences; College of Veterinary Medicine, University of Florida; PO Box 100126 Gainesville FL 32610-0126 USA
4. Department of Pathobiology; College of Veterinary Medicine, University of Florida; PO Box 100126 Gainesville FL 32610-0126 USA