1. Department of Ophthalmology; Otorhinolaryngology and Head and Neck Surgery; School of Medicine of Ribeirão Preto; University of São Paulo
2. Department of Ophthalmology; School of Medicine of Marília; São Paulo Brazil
3. Department of Radiotherapy; School of Medicine of Marília; São Paulo Brazil
4. Departments of Ophthalmology and Public Health Sciences; Penn State College of Medicine; Hershey Pennsylvania USA