1. Diabetology and Endocrinology, Department of Pediatrics, Gdansk Medical University, Department of Pediatrics, Gdansk, Poland
2. Department of Health and Natural Sciences, Gdansk University of Physical Education and Sport, Department of Health and Natural Sciences, Gdansk, Poland
3. Division of Preventive Medicine and Public Health, Department of Public Health Sciences, School of Medicine, University of Murcia, Division of Preventive Medicine and Public Health, Department of Public Health Sciences, School of Medicine, Murcia, Spain
4. Department of Pediatrics, Division of Gastroenterology and Nutrition, McMaster University, Department of Pediatrics, Division of Gastroenterology and Nutrition, Hamilton, ON, Canada
5. Institute of Primary Care, University of Zurich, Institute of Primary Care, Zurich, Switzerland
6. Medbase St. Gallen Am Vadianplatz, St. Gallen, Switzerland