1. From the Departments of Genetics,2Centro de Investigacion Biomedica en Red (CIBER) de Enfermedades Raras, Instituto de Salud Carlos III (ISCIII), Madrid, Spain; the
2. Ophthalmology, and
3. Epidemiology, Fundacion Jimenez Diaz, Madrid, Spain;
4. Genetics Department, Hospital Sant Pau, Barcelona, Spain; and6CIBER de Enfermedades Raras, ISCIII, Barcelona, Spain.