1. IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Bellaterra (Cerdanyola del Vallès), Spain
2. Department of Viroscience, Erasmus Medical Centre, Rotterdam, The Netherlands
3. Virology Division, Department of Infectious Diseases & Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
4. UAB, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Bellaterra (Cerdanyola del Vallès), Spain
5. Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, UAB, Bellaterra (Cerdanyola del Vallès), Spain