1 Department of Pediatrics, Pediatric Endocrinology and Diabetes, Medical Faculty, University of Rzeszów, Rzeszów, Poland.
2 Department of Pediatrics, Medical School, University of Pécs, Pécs, Hungary.
3 National Laboratory for Human Reproduction, Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
4 Department of Pediatrics and Pediatric Endocrinology, Faculty of Medical Sciences, Medical University of Silesia, Katowice, Poland.
5 Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, WI, United States.
6 Department of Endocrinology, Panagiotis & Aglaia Kyriakou Children's Hospital, Athens, Greece.
7 Department of Pediatric and Adolescent Endocrinology, Chair of Pediatrics, Pediatric Institute, Jagellonian University Medical College, Krakow, Poland.