RT Journal Article SR Electronic T1 Prevention of diabetic blindness JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 2 OP 3 DO 10.1136/bjo.2005.082065 VO 90 IS 1 A1 E Stefánsson YR 2006 UL http://bjo.bmj.com/content/90/1/2.abstract AB