1. Pediatric Oncology Service, Hospital San Juan de Dios, Santiago, Chile
2. Hematology-Oncology Service, Hospital J. P. Garrahan, Buenos Aires, Argentina
3. Oncology Service, Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
4. Hematology-Oncology Service, Hospital Sant Joan de Déu, Barcelona, Spain
5. Hematology-Oncology Service, Hospital Calvo Mackenna, Santiago, Chile
6. Hematology-Oncology Service, Hospital Pereyra Rossell, Montevideo, Uruguay
7. Ophthalmology Service, Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
8. Ophthalmology Service, Hospital Calvo Mackenna, Santiago, Chile
9. Pathology Service, Hospital Calvo Mackenna, Santiago, Chile
10. Ophthalmology Service, Hospital Sant Joan de Déu, Barcelona, Spain
11. Pathology Service, Hospital Sant Joan de Déu, Barcelona, Spain
12. Ophthalmology Service, Hospital San Juan de Dios, Santiago, Chile
13. Ophthalmology Service, Hospital J. P. Garrahan, Buenos Aires, Argentina
14. Ophthalmic Pathology Department, Fundación Oftalmologica Malbran, Buenos Aires, Argentina
15. Pathology Service, Hospital J. P. Garrahan, Buenos Aires, Argentina
16. Office of Hematology and Oncology Products, Center for Drug Evaluation and Research, US Food and Drug Administration, Washington, DC
17. Division of Hematology/Oncology, Children’s Hospital of Michigan, Detroit