1. Laboratory Animal Centre, PO Box 5000, FIN-90014 University of Oulu, Finland;
2. Center for Comparative Medicine, Northwestern University, Chicago, IL, USA;
3. Department of Animal Medicine and Surgery, Veterinary Faculty, University Complutense, Madrid, Spain;
4. Department of Experimental Medicine, University of Copenhagen, Denmark;
5. Veterinary Services, University of Oxford, Oxford, UK