1. From the Department of Pathologic Anatomy, the
2. Division of Pediatric Oncology, the
3. Departments of Pediatrics and the
4. Unit of Epidemiology and Biostatistics, and the
5. Department of Experimental Medicine and Pathology, “La Sapienza” University, Rome, Italy; and the
6. Ocular Division, Pediatric Hospital (“Bambino Gesu`”), Research Institute, Rome, Italy; the
7. Visual Science and Neurosurgery, University of Siena, Italy.