1. Institute of Diagnostic Virology, Friedrich‐Loeffler‐Institutes, Federal Research Centre for Virus Diseases of Animals, Insel Riems, Germany,
2. Institute of Microbiology, Federal Research Centre for Virus Diseases of Animals, Tübingen, Germany
3. Institute of Applied Virology, Friedrich‐Loeffler‐Institutes, Federal Research Centre for Virus Diseases of Animals, Insel Riems, Germany,