1. Department of Pediatrics, Endocrinology and Diabetes with a Cardiology Unit, Medical University of Bialystok, Bialystok, Poland
2. Department of Histology and Embryology, Medical University of Bialystok, Bialystok, Poland
3. Department of Children’s Surgery and Transplantology, Children’s Memorial Health Institute, Warsaw, Poland
4. Department of Pediatric Endocrinology and Diabetology, Children’s Memorial Health Institute, Warsaw, Poland
5. Department of Physiology, Medical University of Bialystok, Bialystok, Poland
6. Department of Medical Patomorphology, Medical University of Bialystok, Bialystok, Poland