1. Division of Pediatric Oncology National Cancer Institute Rio de Janeiro Rio de Janeiro Brazil
2. Division of Hematology, Oncology, and BMT, Nationwide Children's Hospital The Ohio State University Columbus Ohio USA
3. Division of Neurosurgery National Cancer Institute Rio de Janeiro Rio de Janeiro Brazil
4. Division of Radiation Oncology National Cancer Institute Rio de Janeiro Rio de Janeiro Brazil
5. Internal Medicine Department State University of Rio de Janeiro Rio de Janeiro Rio de Janeiro Brazil