1. Radiotherapy Department, MSC National Research Institute of Oncology Gliwice Branch, 44-101 Gliwice, Poland
2. Department of Pediatric Neurosurgery, Medical University of Silesia, 40-752 Katowice, Poland
3. Department of Pediatrics and Pediatric Endocrinology, Faculty of Medical Science, Medical University of Silesia, 40-752 Katowice, Poland
4. Department of Pediatrics and Pediatric Endocrinology, Upper Silesian Medical Center in Katowice, 40-752 Katowice, Poland
5. Radiotherapy and Brachytherapy Planning Department, MSC National Research Institute of Oncology Gliwice Branch, 44-101 Gliwice, Poland