1. Department of Metabolic Diseases, Jagiellonian University Medical College, Krakow, Poland
2. Department of Diabetology and Internal Medicine, Medical University of Warsaw, Warsaw, Poland
3. Department of Internal Diseases, Medical University of Lublin, Lublin, Poland
4. Department of Pediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poznan, Poland
5. Department of Children's Diabetology, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland
6. Department of Pediatrics, Diabetology and Endocrinology, Medical University of Gdansk, Gdansk, Poland
7. Department of Pediatrics, Diabetology, Endocrinology and Nephrology, Medical University of Lodz, Lodz, Poland
8. Department of Internal Medicine and Diabetology, Poznan University of Medical Science, Poznan, Poland