1. Department of Endocrinology and Diabetology; Children's Memorial Health Institute; Warsaw Poland
2. The Faculty of Medicine and Health Sciences; Jan Kochanowski University; Kielce Poland
3. Department of Paediatrics; Medical University of Warsaw; Warsaw Poland
4. II Department of Paediatrics, Paediatric Endocrinology and Diabetes, Medical Faculty; University of Rzeszów; Rzeszów Poland
5. Department of Paediatric Endocrinology and Diabetology; Medical University of Lublin; Lublin Poland
6. Department of Clinical Paediatrics, Faculty of Medical Sciences, Provincial Specialist Children's Hospital; University of Warmia and Mazury in Olsztyn; Olsztyn Poland
7. Endocrinology and Diabetology Ward; General District Hospital; Kielce Poland
8. Department of Paediatrics, Endocrinology and Diabetology with a Cardiology Division; Medical University of Białystok; Białystok Poland
9. Department of Paediatric Endocrinology; Medical University of Warsaw; Warsaw Poland