1. Department of Animal Anatomy; Faculty of Veterinary Medicine; University of Warmia and Mazury in Olsztyn; Oczapowskiego str.13 Bldg. 105J 10-719 Olsztyn Poland
2. Division of Animal Anatomy; Biostructore and Animal Physiology; Faculty of Veterinary Medicine; Wrocław University of Environmental and Life Sciences; Kożuchowska str. 1-3 51-631 Wrocław Poland