1. Laboratory of Pathology and Toxicology, Department of Pathobiology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, Pennsylvania
2. Department of Animal Medicine, Surgery and Pathology, School of Veterinary Medicine, Complutense University of Madrid, Madrid, Spain
3. Department of Public Health, Comparative Pathology and Veterinary Hygiene, Faculty of Veterinary Medicine, University of Padova, AGRIPOLIS–Viale dell’Università 16, Legnaro Padua, Italy