RT Journal Article SR Electronic T1 Stability of inflammatory phenotypes in asthma JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 665 OP 667 DO 10.1136/thoraxjnl-2012-201657 VO 67 IS 8 A1 Ruth H Green A1 Ian Pavord YR 2012 UL http://thorax.bmj.com/content/67/8/665.abstract AB