PT - JOURNAL ARTICLE AU - D M Mitchell AU - S O Shaheen AU - A A Woodcock TI - INTRODUCTION AID - 10.1136/thorax.57.suppl_2.ii1 DP - 2002 Oct 01 TA - Thorax PG - ii1--ii1 VI - 57 IP - suppl 2 4099 - http://thorax.bmj.com/content/57/suppl_2/ii1.short 4100 - http://thorax.bmj.com/content/57/suppl_2/ii1.full SO - Thorax2002 Oct 01; 57