PT - JOURNAL ARTICLE AU - P A Corris TI - Commentary AID - 10.1136/thx.53.7.619 DP - 1998 Jul 01 TA - Thorax PG - 619--619 VI - 53 IP - 7 4099 - http://thorax.bmj.com/content/53/7/619.short 4100 - http://thorax.bmj.com/content/53/7/619.full SO - Thorax1998 Jul 01; 53