PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1136/thx.2008.102947corr1 DP - 2009 Jan 01 TA - Thorax PG - 91--91 VI - 64 IP - 1 4099 - http://thorax.bmj.com/content/64/1/91.1.short 4100 - http://thorax.bmj.com/content/64/1/91.1.full SO - Thorax2009 Jan 01; 64