1. Immunology-Vaccinology (B43b), Department of Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, University of Liège, 4000 Liège, Belgium
2. Laboratory of Biochemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen UR, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands
3. MRC–University of Glasgow Centre for Virus Research, 8 Church Street, Glasgow G11 5JR, UK
4. Division of Biomedical & Life Sciences, Lancaster University, Lancaster LA1 4YQ, UK