1. Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Białystok, Poland
2. Department of Pediatric Laboratory Diagnostics, Medical University of Bialystok, 15-274 Białystok, Poland
3. Department of Pediatrics and Nephrology, Medical University of Bialystok, 15-274 Białystok, Poland
4. Department of Neonatology, Pathology and Newborn Intensive Care, Jędrzej Śniadecki Independent Public Healthcare Center—Regional Hospital, 15-027 Białystok, Poland