1. Clinic for Poultry and Fish Medicine, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
2. State Veterinary Institute Jihlava, Rantířovská 93/20, 58605 Jihlava, Czech Republic
3. University of Veterinary and Pharmaceutical Sciences Brno, Palackého tř. 1946/1, 61242 Brno, Czech Republic