1. Ophthalmology, Mater Misericordiae University Hospital, Dublin, Ireland
2. School of Biochemistry & Cell Biology, University College Cork, Cork, Ireland
3. Department of Anatomy, University College Dublin School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin, Ireland
4. School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
5. The North Texas Eye Research Institute, University of North Texas, Health Science Center, Fort Worth, Texas, United States