1. Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Kożuchowska St. 1, 51-631 Wrocław, Poland
2. Division of Histology and Embryology, Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Norwida St. 25, 50-375 Wrocław, Poland
3. Department of Prosthetic Dentistry, Faculty of Dentistry, Wrocław Medical University, Krakowska St. 26, 50-425 Wrocław, Poland