1. Department of Ophthalmology, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, Madrid - Spain
2. Department of Ophthalmology, Vissum Madrid, Madrid - Spain
3. Department of Ophthalmology, Clínica Rementería, Madrid - Spain
4. Department of Ophthalmology, Hospital Universitario La Paz, Instituto de Investigación La Paz, Madrid - Spain
5. Instituto de Cirugia Ocular, San Jose, Costa Rica
6. The King Khaled Eye Specialist Hospital, Riyadh, Kingdom of Saudi Arabia, and the Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, USA
7. Clinica Oftalmologica Centro Caracas and the Arevalo-Coutinho Foundation for Research in Ophthalmology, Caracas, Venezuela
8. Universidade Federal de São Paulo - Departamento de Oftalmologia - Instituto da Visão - Sao Paulo, Brazil
9. Asociación para Evitar la Ceguera en México, Mexico City, Mexico
10. University of Colorado, School of Medicine, Denver, Colorado, USA
11. Fundacion Oftalmologica Nacional, Universidad del Rosario, Bogota, Colombia
12. University of Puerto Rico, San Juan, Puerto Rico
13. Fundacion Conde Valenciana, Mexico City, Mexico
14. Clínica Ricardo Palma, Lima, Peru
15. Hospital Universitario Austral, Buenos Aires, Argentina
16. Universidade Federal de Goiás- Departamento de Oftalmologia - Goiânia, Brazil
17. Hospital de Olhos de Araraquara, and the Universidade de Sao Paulo, Sao Paulo, Brazil
18. Fundacion Oftalmologica Los Andes, Santiago de Chile, Chile
19. OFTALMOS, Catedra de Oftalmologia, Universidad de Buenos Aires, Buenos Aires, Argentina
20. Hospital Metropolitano, Quito, Ecuador
21. Hospital La Fe, Universidad de Valencia, Spain
22. Hospital Universitario Ramón y Cajal, Departamento de Retina, and VISSUM Madrid Mirasierra de Oftalmología Integral, Madrid, Spain.