1. Department of Ophthalmology, Federal University of Health Sciences of Porto Alegre, Porto Alegre, Brazil.
2. Department of Ophthalmology, Scientific Institute San Raffaele, Milan, Italy.
3. University Vita-Salute, Milan, Italy.
4. Post-Graduation Ophthalmological School, Ivo Corrêa-Meyer/Cardiology Institute, Porto Alegre, Brazil.