RT Journal Article SR Electronic T1 Isosorbide dinitrate plus hydralazine was effective for advanced heart failure in black patients JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 44 OP 44 DO 10.1136/ebm.10.2.44 VO 10 IS 2 YR 2005 UL http://ebm.bmj.com/content/10/2/44.abstract AB