1. Department of Large Animals Diseases and Clinic, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 166, 02-787 Warsaw, Poland
2. Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
3. Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776 Warsaw, Poland
4. Veterinary Diagnostic Laboratory, University of Kentucky, Lexington, KY 40506, USA