1. Department of Histology and Embryology with Laboratory of Experimental Cytology, Medical University of Lublin, 20-080 Lublin, Poland
2. Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences Lublin, 20-950 Lublin, Poland
3. Department of Maritime and Hyperbaric Department, Military Institute of Medicine, 81-519 Gdynia, Poland
4. Department of Clinical Nutrition, Medical University of Gdansk, 80-210 Gdansk, Poland