RT Journal Article SR Electronic T1 Branch retinal artery occlusion; another complication of sildenafil JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 928 OP 928 DO 10.1136/bjo.84.8.928g VO 84 IS 8 A1 AJAY TRIPATHI A1 NIALL P O'DONNELL YR 2000 UL http://bjo.bmj.com/content/84/8/928.8.abstract AB