1. Department of Developmental Age Psychiatry and Psychotherapy, John Paul II Pediatric Centre in Sosnowiec, Faculty of Medical Sciences, Medical University of Silesia in Katowice, ul. Zapolskiej 3, 41-218 Sosnowiec, Poland
2. Department of Histology, Faculty of Medical Sciences, Medical University of Silesia in Katowice, ul. Medyków 18, 40-752 Katowice, Poland