RT Journal Article SR Electronic T1 Long term warfarin associated with bilateral blindness in a patient with atrial fibrillation and macular degeneration JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 985 OP 985 DO 10.1136/heart.89.9.985 VO 89 IS 9 A1 T Ung A1 M James A1 R H Gray YR 2003 UL http://heart.bmj.com/content/89/9/985.1.abstract AB