PT - JOURNAL ARTICLE AU - FLEETHAM, JOHN A TI - Introduction AID - 10.1136/thx.53.2008.S1 DP - 1998 Oct 01 TA - Thorax PG - S1--S1 VI - 53 IP - suppl 3 4099 - http://thorax.bmj.com/content/53/suppl_3/S1.short 4100 - http://thorax.bmj.com/content/53/suppl_3/S1.full SO - Thorax1998 Oct 01; 53