1. Department of Ophthalmology, University of Bonn, Bonn, Germany.
2. Vision Institute (IPEPO), Federal University of São Paulo, São Paulo, Brazil.
3. Department of Ophthalmology, Triemli Hospital, Zurich, Switzerland.
4. Department of Ophthalmology, Philipps-University Marburg, Marburg, Germany.
5. Eye Clinic, House of Thousand Windows, Duisburg, Germany.