1. Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
2. Center of Systems Neuroscience, Hannover, Germany
3. Department of Nonclinical Drug Safety, Boehringer Ingelheim Pharma GmbH & Co KG, Biberach (Riß), Germany
4. Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institute, Greifswald, Germany