Affiliation: | 1 Ophthalmology, Landspitali University Hospital, Iceland 2 Faculty of Medicine, University of Iceland, Reykjavik, Iceland 3 Neuroscience Research, University of Akureyri, Iceland 4 Icelandic Heart Association, Kopavogur, Iceland 5 Laboratory of Epidemiology, Demography and Biometry, Intramural Research Program, National Institute of Ageing, Bethesda, Maryland 6 Ophthalmology and Visual Sciences, University of Wisconsin Madison, Madison, Wisconsin 7 Division of Epidemiology and Clinical Research, National Eye Institute, Bethesda, Maryland |