1. Sørlandet Hospital HF Arendal, Department of Pediatrics, Arendal, Norway

2. University Hospital Centre Zagreb Faculty of Medicine, Department of Pediatric Endocrinology and Diabetes, Zagreb, Croatia

3. Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases; University Hospital Merkur Faculty of Medicine; University of Zagreb, Zagreb, Croatia

4. University Hospital Centre Zagreb, Clinical Institute of Laboratory Diagnosis, Zagreb, Croatia

5. University Hospital Centre Zagreb Faculty of Medicine, Department of Endocrinology, Zagreb, Croatia

6. University Hospital Center Zagreb Faculty of Medicine, Department of Pediatrics, Zagreb, Croatia