1. Division of Pediatric Hematology and Oncology; Department of Pediatrics; Faculty of Medicine; University of Pécs; Pécs Hungary
2. Division of Pediatric Hematology and Oncology; II Department of Pediatrics; Semmelweis University of Budapest; Budapest Hungary
3. Institute for Medical Informatics; University of Szeged; Szeged Hungary
4. Department of Information Technology; Faculty of Sciences; University of Pécs; Pécs Hungary
5. National Centre for Epidemiology; Budapest Hungary