1. Grampian University Hospitals NHS Trust; Ophthalmology Department; Foresterhill Aberdeen UK AB25 2ZN
2. Queen's University; Centre for Vascular and Visual Sciences (CVVS); Belfast UK
3. University of Aberdeen; Medical Statistics Team; Polwarth Building Foresterhill Aberdeen Scotland UK AB 25 2 ZD
4. University of St Andrews; School of Medicine, Medical and Biological Sciences Building; Fife UK KY16 9TF
5. University of Aberdeen; Health Services Research Unit; 3rd Floor Health Sciences Building Foresterhill Aberdeen Scotland UK AB25 2ZD
6. Assistance Hopitaux Publique de Paris; Ophthalmology; 2 rue Ambroise Pare Paris Cedex 10 France 75475
7. Glostrup Hospital, University of Copenhagen; Ophthalmology; Ndr. Ringvej 57 Copenhagen Denmark DK-2600
8. Hong Kong Sanatorium and Hospital; Department of Ophthalmology; Happy Valley Hong Kong China