1. Department of Histology; School of Medicine in Katowice; Medical University of Silesia; Katowice Poland
2. Department of Histology and Cellular Pathology; School of Medicine with Division of Dentistry in Zabrze; Medical University of Silesia; Zabrze Poland
3. Department of Biotechnology; University of Alicante; Alicante Spain
4. Department of Histology and Embryology; Bogomolets National Medical University; Kyiv Ukraine
5. Faculty of Health and Medicine; Division of Biomedical and Life Sciences; Lancaster University; Lancaster UK