1. Department of Surgery Wrocław University of Environmental and Life Sciences Wrocław Poland
2. Department of Pathology Wrocław University of Environmental and Life Sciences Wrocław Poland
3. Department of Animal Physiology and Biostructure Division of Animal Physiology Wrocław University of Environmental and Life Sciences Wrocław Poland
4. Hospital for Small Animals Royal (Dick) School of Veterinary Studies University of Edinburgh Roslin UK