1. From the Hematology/Oncology,
2. Ophthalmology,
3. Pharmacology Department, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Argentina; and the
4. Pharmacy, and
5. Pathology Services, Hospital J. P. Garrahan, Buenos Aires, Argentina; the
6. Ophthalmic Oncology Service, Memorial Sloan Kettering Cancer Center, New York, New York.