| Affiliation: | 1. Department of Pediatric Oncology, Hematology and Transplantology, University of Medical Sciences, Poznan, Poland;2. Department of Pediatric Hematology, Oncology and Stem Cell Transplantation, Medical University, Lublin, Poland;3. Department of Pediatric Stem Cell Transplantation, Hematology and Oncology, Medical University, Wroclaw, Poland;4. Department of Pediatric Hematology and Oncology, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland;5. Department of Microbiology, Collegium Medicum, Nicolaus Copernicus University Torun, Bydgoszcz, Poland;6. Stem Cell Transplant Center, Department of Clinical Immunology and Transplantology, Jagiellonian University Collegium Medicum, University Children's Hospital, Krakow, Poland |
