1. Department of Biochemistry and Molecular Biology, University of La Rioja, Logroño, Spain
2. Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut (FLI), Neustadt-Mariensee, Germany
3. Department of Veterinary Medicine, Institute of Microbiology and Epizootics, Centre of Infection Medicine, Freie Universität Berlin, Berlin, Germany
4. College of Veterinary Medicine, China Agricultural University, Beijing, China
5. Faculty of Veterinary Science, University of Zaragoza, Zaragoza, Spain
6. Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany