1. Department of Pediatrics, Endocrinology, Diabetology with Subdivision of Cardiology, Medical University of Białystok, Ulica Kilińskiego 1, 15-089 Białystok, Poland
2. Department of Pediatrics, Endocrinology, Diabetology with Subdivision of Cardiology, Children’s University Hospital in Białystok, Ulica Waszyngtona 17, 15-274 Białystok, Poland