RT Journal Article SR Electronic T1 Peroxisome proliferator-activated receptor ligands for airway diseases? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 542 OP 542 DO 10.1136/thorax.58.6.542 VO 58 IS 6 A1 K Parameswaran YR 2003 UL http://thorax.bmj.com/content/58/6/542.abstract AB