1. Department of Pediatrics; Medical University of Silesia; Katowice Poland
2. Departments of Internal Medicine, Diabetology, and Nephrology, Metabolic Bone Diseases Unit; Medical University of Silesia; Katowice Poland
3. Department of Social Pediatrics; Wroclaw Medical University; Wroclaw Poland
4. Allegro Med Outpatient Medical Care; Gliwice Poland
5. Department of Pathomorphology, School of Medicine with the Division of Dentistry in Zabrze; Medical University of Silesia; Katowice Poland