1. MRC–University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
2. Department of Microbiology and Infectious Diseases, Veterinary Faculty, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Department of Pathology, Veterinary Faculty, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium