1. Department of Pathology; Center for Biostructure, Medical University of Warsaw; Warsaw Poland
2. Student's Scientific Group at the Department of Pathology; Children's Memorial Health Institute; Warsaw Poland
3. Department of Clinical Anatomy; Children's Memorial Health Institute; Warsaw Poland
4. Department of Pathology; Children's Memorial Health Institute; Warsaw Poland
5. Department of Histology and Embryology; Center of Biostructure, Medical University of Warsaw; Warsaw Poland