1. From the Department of Ophthalmology, University of Iceland, Reykjavik, Iceland;
2. the Department of Ophthalmology, Landspitali-University Hospital, Reykjavik, Iceland; and
3. the Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, Indiana.
4. From the Department of Ophthalmology, University of Iceland, Reykjavik, Iceland; the 2Department of Ophthalmology, Landspitali-University Hospital, Reykjavik, Iceland; and