PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd and British Thoracic Society TI - Abstracts AID - 10.1136/thx.7.3.277 DP - 1952 Sep 01 TA - Thorax PG - 277--284 VI - 7 IP - 3 4099 - http://thorax.bmj.com/content/7/3/277.short 4100 - http://thorax.bmj.com/content/7/3/277.full SO - Thorax1952 Sep 01; 7