1. Department of Cytology, Institute of Zoology, Faculty of Biology, University of Warsaw, Warsaw, Poland
2. Department of Clinical Cytology, Medical Centre of Postgraduate Education, Warsaw, Poland
3. Department of Cellular Engineering, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
4. Department of Regenerative Medicine, Military Institute of Hygiene and Epidemiology, Warsaw, Poland