1. German Federal Institute for Risk Assessment (BfR), Department for Biological Safety, Berlin, Germany
2. Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
3. Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität Gießen, Gießen, Germany
4. Institute for Terrestrial and Aquatic Wildlife Research (ITAW), University of Veterinary Medicine Hannover, Hanover, Germany