1. LABOKLIN GmbH and Co. KG., 97688 Bad Kissingen, Germany
2. Small Animal Clinic, Faculty of Veterinary Medicine, Freie Universität Berlin, 14163 Berlin, Germany
3. Institute of Infectology, Friedrich-Loeffler-Institute, 17493 Greifswald, Germany
4. Avia-GIS, 2980 Zoersel, Belgium