1. Department of Pediatrics, Oncology, Hematology and Diabetology, Medical University of Lodz, 91-738 Lodz, Poland
2. Department of Studies on Alcoholism and Other Dependencies, Institute of Psychiatry and Neurology, 02-957 Warsaw, Poland
3. Students’ Scientific Circle at the Department of Pediatrics, Oncology, Hematology and Diabetology, Medical University of Lodz, 91-738 Lodz, Poland
4. Department of Pediatrics, Diabetology and Endocrinology, Medical University of Gdańsk, 80-211 Gdańsk, Poland