1. Children and Adolescent Hematology‑Oncology Unit, 2nd Department of Pediatrics, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki AHEPA University Hospital, Thessaloniki 546 36, Greece
2. Laboratory of Biological Chemistry, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
3. Department of Pediatric Hematology and Oncology, Hippokration General Hospital, Thessaloniki 546 42, Greece