RT Journal Article SR Electronic T1 Raised troponin in COPD: clinical implications and possible mechanisms JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 71 OP 72 DO 10.1136/heartjnl-2012-302969 VO 99 IS 2 A1 Ian S Stone A1 Steffen E Petersen A1 Neil C Barnes YR 2013 UL http://heart.bmj.com/content/99/2/71.abstract AB