Institution: | 1. Institute of Microbiology and Epizootics (IMT), Free University Berlin, Philippstraße 13, 10115 Berlin, Germany;2. Institute for Hygiene, University of Muenster, Robert-Koch-Street 41, 48149 Muenster, Germany;3. Clinic and Policlinic for Small Animals, Free University Berlin, Oertzenweg 19b, 14163 Berlin, Germany;4. Institute of Medical Biology, University of Tromso, N-9037 Tromso, Norway |