1. Namur Research Institute for Life Sciences (NARILIS), Integrated Veterinary Research Unit (URVI), University of Namur, Namur, Belgium
2. Equipe Transcription et Lymphome Viro-Induit (TLVI), UMR 7261 CNRS, UFR Sciences et Techniques, Université François Rabelais de Tours, Parc de Grandmont, Tours, France
3. INRAE, UMR1282 ISP, Equipe Biologie des Virus Aviaires, Nouzilly, France
4. Institute of Virology, Freie Universität Berlin, Berlin, Germany
5. Veterinary Centre for Resistance Research (TZR), Freie Universität Berlin, Berlin, Germany