RT Journal Article SR Electronic T1 Five years of surveillance JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 838 OP 839 DO 10.1136/bjo.86.8.838 VO 86 IS 8 A1 M R Stanford YR 2002 UL http://bjo.bmj.com/content/86/8/838.abstract AB