1. IHAP, Université de Toulouse, INRAE, ENVT , Toulouse 31076, France
2. Department of Virology, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna ‘Bruno Ubertini’ , Brescia 25124, Italy
3. Department of microbiology, National Veterinary Institute , Uppsala SE-751 89, Sweden
4. Central Veterinary Research Laboratory , Celbridge, Co. Kildare W23 X3PH, Ireland
5. Clinical and Applied Virology Group, Department of Infection and Immunity, Luxembourg Institute of Health , Esch-sur-Alzette L-4354, Luxembourg
6. Fundamental and Applied Research for Animals and Health (FARAH) Center, University of Liège , Liège 4000, Belgium