Affiliation: | 1. Argentinian Oncopediatric Registry, National Cancer Institute, Ministry of Health, Buenos Aires, Argentina;2. Garrahan Pediatric Hospital, Buenos Aires, Argentina;3. Victor Vilela Children's Hospital, Rosario, Argentina;4. Italian Hospital, Buenos Aires, Argentina;5. Alejandro Posadas National Hospital, Morón, Argentina;6. Humberto Notti Children's Hospital, Mendoza, Argentina;7. Ricardo Gutiérrez Children's Hospital, Buenos Aires, Argentina;8. Austral University Hospital, Pilar, Argentina |