1. Virology Department; Animal Health and Veterinary Laboratories Agency; Addlestone UK
2. Department of Microbial and Cellular Sciences; Faculty of Health and Medical Sciences; University of Surrey; Guildford UK
3. Department of Anatomy and Comparative Pathology; Faculty of Veterinary Medicine; Murcia University; Murcia Spain
4. Department of Pathology; Animal Health and Veterinary Laboratories Agency; Addlestone UK
5. Faculty of Veterinary Medicine; Warsaw University of Life Sciences; Warsaw Poland
6. School of Veterinary Medicine; Faculty of Health and Medical Sciences; University of Surrey; Guildford UK