1. Retina Department, Institute of Ophthalmology, Fundación Conde de Valenciana, Mexico City, Mexico
2. Genetics Department, Hospital Infantil de México, Federico Gómez, Mexico City, Mexico
3. Genetics Department, Institute of Ophthalmology, Fundación Conde de Valenciana, Mexico City, Mexico
4. Biochemistry Department, faculty of Medicine, UNAM, Mexico City, Mexico