RT Journal Article SR Electronic T1 Is age a risk factor for diabetic retinopathy? JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 1268 OP 1268 DO 10.1136/bjo.2009.169326 VO 94 IS 9 A1 Colin Siang Hui Tan A1 Edwin Ming Quan Gay A1 Wei Kiong Ngo YR 2010 UL http://bjo.bmj.com/content/94/9/1268.1.abstract AB