PT - JOURNAL ARTICLE AU - D R Baldwin AU - J M Andrews AU - J P Ashby AU - R Wise AU - D Honeybourne TI - AUTHORS' REPLY AID - 10.1136/thx.45.12.982-b DP - 1990 Dec 01 TA - Thorax PG - 982--983 VI - 45 IP - 12 4099 - http://thorax.bmj.com/content/45/12/982.3.short 4100 - http://thorax.bmj.com/content/45/12/982.3.full SO - Thorax1990 Dec 01; 45