1. Department of Pediatrics, Oncology, Hematology and Diabetology, Medical University of Lodz, Poland
2. Department of Diabetes and Obesity for Children and Adolescents, Poznan, Poland
3. Department of Pediatrics, Endocrinology and Neurology, Children’s Hospital, Torun, Poland
4. Department of Diabetology and Internal Diseases, Pomeranian Medical University, Szczecin, Poland
5. Department of Endocrinology and Diabetology, Warsaw, Poland; Department of Health Sciences UJK, Kielce, Poland
6. Department of Pediatrics, Medical University, Warsaw, Poland