1. State University of Campinas; Department of Ophthalmology, College of Medical Sciences; Tessália Vieira de Camargo Street 126 PO Box 6111 São Paulo Brazil 13087-970
2. Santa Casa de Campo Mourão; Department of Medicine; BR 158 Saída para Peabiru, 2761 Campo Mourão Campo Mourão Brazil 87309-650
3. State University of Campinas; Glaucoma Service, Department of Ophthalmology; São Paulo Brazil