1. Department of Histology, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
2. Department of Social and Clinical Gerontology, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
3. Department of Animal and Human Physiology, University of Gdańsk, J. Bażyńskiego 8 Street, 80-308 Gdańsk, Poland