1. Operational Direction Viral Diseases; Veterinary and Agrochemical Research Centre (CODA-CERVA); Brussels Belgium
2. Department of Biomedical Sciences; Institute of Tropical Medicine; Antwerp Belgium
3. Plant Protection and Ecotoxicology, Life Science Department; Walloon Agricultural Research Centre (CRA-W); Gembloux Belgium
4. Department of Infectious and Parasitic Diseases; Faculty of Veterinary Medicine, University of Liège; Liège Belgium
5. Department of Veterinary Tropical Diseases; Faculty of Veterinary Science, University of Pretoria; Pretoria South Africa