1. Institute of Molecular Virology and Cell Biology, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
2. Department of Experimental Animal Facilities and Biorisk Management, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
3. Institute for Immunology, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
4. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany