RT Journal Article SR Electronic T1 Retinopathy of prematurity JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 806 OP 806 DO 10.1136/bjo.81.9.806a VO 81 IS 9 A1 DAVID KENT A1 DAVID CLARK YR 1997 UL http://bjo.bmj.com/content/81/9/806.2.abstract AB