1. Bundeswehr Institute of Microbiology, Munich, Germany
2. Academy of Sciences, Brno, Czech Republic
3. Centre d’Etudes du Bouchet, Vert le Petit, FranceUniversité Paris-Sud 11, Orsay, France
4. Veterinary Laboratories Agency, Addlestone, UK
5. University of Aachen, Aachen, Germany
6. Veterinary University of Leipzig, Leipzig, Germany