PT - JOURNAL ARTICLE ED - , TI - CORRECTION AID - 10.1136/thx.2006.063271corr1 DP - 2007 Feb 01 TA - Thorax PG - 191--191 VI - 62 IP - 2 4099 - http://thorax.bmj.com/content/62/2/191.short 4100 - http://thorax.bmj.com/content/62/2/191.full SO - Thorax2007 Feb 01; 62