1. Department of Ophthalmology, Mater Misericordiae University Hospital, Dublin, Ireland
2. Clinical Research Centre, School of Medicine, University College Dublin, Dublin, Ireland
3. Ocular Genetics Unit, Smurfit Institute of Genetics, University of Dublin, Trinity College, Dublin, Ireland
4. Duke Eye Centre, Durham, North Carolina, United States
5. Department of Cell Biology & Immunology and the North Texas Eye Research Institute, U. North Texas Health Science Centre, Ft. Worth, Texas, United States