1. Division of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, Poland
2. Amphibian Biology Group, Department of Evolutionary Biology and Conservation of Vertebrates, Faculty of Biological Sciences, University of Wroclaw, Poland
3. Department of Physiotherapy, Wroclaw University School of Physical Education, Poland
4. Division of Ultrastructure Research, Wroclaw Medical University, Poland