RT Journal Article SR Electronic T1 Safety and potential benefits of low dose diamorphine during exercise in patients with chronic heart failure JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1085 OP 1086 DO 10.1136/heart.89.9.1085 VO 89 IS 9 A1 S G Williams A1 D J Wright A1 P Marshall A1 A Reese A1 B-H Tzeng A1 A J S Coats A1 L-B Tan YR 2003 UL http://heart.bmj.com/content/89/9/1085.abstract AB