1. Department of Pediatric Endocrinology, Diabetology with Cardiology Division, Medical University of Bialystok, Bialystok, Poland;
2. Department of Pediatric Nephrology and Endocrinology, Silesian Medical University, Zabrze, Poland;
3. Division of Cardiology, Internal Affairs Ministry Hospital in Bialystok, Białystok, Poland;
4. Department of Ophthalmology and Visual Rehabilitation, Medical University of Bialystok, Białystok, Poland;
5. Department of Endocrinology and Diabetology for Children and Adolescents, Wroclaw Medical University, Wrocław, Poland;
6. Department of Pediatrics, Endocrinology, Diabetology, Metabolic Diseases and Cardiology of the Developmental Age, Pomeranian Medical University, Szczecin, Poland;
7. Department of Pediatrics and Endocrinology, Medical University of Warsaw, Warsaw, Poland;
8. Department of Endocrinology and Diabetology, Children's Memorial Health Institute, Warsaw, Poland;
9. Faculty of Health Sciences, Jan Kochanowski University, Kielce, Poland;
10. Molecular Thyroid Research Laboratory, Department of Medicine I, Johannes Gutenberg University (JGU) Medical Center, Mainz, Germany