1. Clinic for Birds, Reptiles, Amphibians and Fish, Justus Liebig University Giessen, Giessen, Germany
2. Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
3. Unit for Biomathematics and Data Processing, Veterinary Faculty, Justus Liebig University Giessen, Giessen, Germany