1. Department of Pediatrics, Endocrinology, Diabetology with a Cardiology Division, Medical University of Bialystok , Białystok , Poland
2. Department of Pediatrics, Rheumatology, Immunology and Metabolic Bone Diseases, Medical University of Bialystok , Białystok , Poland
3. Department of Oncology and Metabolism, University of Sheffield , Sheffield , UK
4. Academic Endocrine Unit, Radcliffe Department of Medicine, Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford , Oxford , UK
5. Department of Pediatric Endocrinology, Great Ormond Street Hospital for Children , London , UK
6. Nuffield Department of Women’s & Reproductive Health, University of Oxford , Oxford , UK