1. Department of Paediatrics, Endocrinology, Diabetology, Metabolic Disorders and Cardiology of the Developmental Age, Pomeranian Medical University, 71-252 Szczecin, Poland
2. Department of Endocrinology and Diabetology of Children and Adolescents, Wroclaw Medical University, 50-367 Wroclaw, Poland
3. Department of Paediatrics and Endocrinology, Medical University of Warsaw, 02-091 Warsaw, Poland
4. Department of Paediatrics and Paediatric Endocrinology with Division of Sex Development Disorders, Upper Silesia Children’s Health Centre, Medical University of Silesia, 40-055 Katowice, Poland
5. Department of Paediatrics, Endocrinology, Diabetology with Cardiology Division, Medical University of Bialystok, 15-089 Bialystok, Poland
6. Department of Endocrinology of Children and Young Adults, Collegium Medicum, Jagiellonian University, 31-008 Krakow, Poland