1. Poznan University of Medical Sciences, Institute of Pediatrics, Department of Pediatric Endocrinology and Rheumatology, Poznan, Poland

2. Wroclaw Medical University, Department of Endocrinology and Diabetology for Children and Adolescents, Wroclaw, Poland

3. Poznan University of Medical Sciences, Institute of Pediatrics, Department of Pediatric Endocrinology and Rheumatology; Karol Jonscher’s Clinical Hospital, Poznan, Poland