RT Journal Article SR Electronic T1 ACE in COPD: a therapeutic target? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 556 OP 558 DO 10.1136/thorax.58.7.556 VO 58 IS 7 A1 R Forth A1 H Montgomery YR 2003 UL http://thorax.bmj.com/content/58/7/556.abstract AB