1. Registro Onco-pediatrico Hospitalario Argentino (ROHA, Hospital-based Pediatric Cancer Registry from Argentina); Instituto Nacional del Cáncer; Buenos Aires Argentina
2. Department of Pediatrics; New York Medical College; New York New York
3. Ophthalmology Service; Hospital JP Garrahan; Buenos Aires Argentina
4. Institute for Clinical Effectiveness and Health Policy; Buenos Aires Argentina
5. Department of Psychosocial Oncology and Palliative Care; Dana-Farber Cancer Institute; Boston Massachusetts
6. Instituto de Cálculo; University of Buenos Aires; Buenos Aires Argentina
7. Hematology-Oncology Service; Hospital JP Garrahan; Buenos Aires Argentina