PT - JOURNAL ARTICLE ED - , TI - CORRECTION AID - 10.1136/thorax.58.2.188 DP - 2003 Feb 01 TA - Thorax PG - 188--188 VI - 58 IP - 2 4099 - http://thorax.bmj.com/content/58/2/188.short 4100 - http://thorax.bmj.com/content/58/2/188.full SO - Thorax2003 Feb 01; 58