1. Institute of Molecular and Experimental Medicine, School of Medicine, Cardiff University, Heath Park, Cardiff, United Kingdom.
2. Department of Endocrinology and Diabetes Mellitus, Royal College of Surgeons in Ireland, Connolly Hospital, Blanchardstown, Dublin, Ireland.
3. Royal Victoria Eye & Ear Hospital, Dublin, Ireland.
4. Department of Ophthalmology, University Hospital of Wales, Heath Park, Cardiff, United Kingdom.