1 Virology Section, Infectious Diseases and Immunology Division, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
2 Department of Cell Biology, Erasmus Medical Center, Rotterdam, the Netherlands.
3 Harbour BioMed, Rotterdam, the Netherlands.
4 Department of Viroscience, Erasmus Medical Center, Rotterdam, the Netherlands.
5 University of Veterinary Medicine, Hannover, Germany.
6 Virology Section, Infectious Diseases and Immunology Division, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands. b.j.bosch@uu.nl.