| Affiliation: | 1. Division of Haematology/Oncology, The Hospital for Sick Children, , Toronto, Ontario, Canada;2. McMaster Children's Hospital, , Hamilton, Ontario, Canada;3. National Pediatric Oncology Unit, , Guatemala City, Guatemala;4. Pediatric Oncology, Benjamin Bloom National Children's Hospital, , San Salvador, El Salvador;5. Pediatric Oncology, Hospital Escuela, , Tegucigalpa, Honduras;6. Hospital Mario Catarino Rivas, , San Pedro Sula, Honduras;7. St. Jude Children's Research Hospital, , Memphis, Tennessee |
