1. Department of Genetics-Research Unit; Institute of Ophthalmology “Conde de Valenciana”; Mexico City Mexico
2. Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore Maryland
3. Division of Genomic Medicine; National Medical Center “20 de Noviembre”; ISSSTE; Mexico City Mexico
4. Faculty of Medicine; Department of Biochemistry; National Autonomous University of Mexico (UNAM); Mexico City Mexico