RT Journal Article SR Electronic T1 Socioeconomic status and outcomes in heart failure with reduced ejection fraction JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP heartjnl-2017-312814 DO 10.1136/heartjnl-2017-312814 A1 Iain Squire YR 2018 UL http://heart.bmj.com/content/early/2018/01/22/heartjnl-2017-312814.abstract AB