PT - JOURNAL ARTICLE AU - O'Hickey, SP TI - AUTHOR'S REPLY AID - 10.1136/thx.45.1.78-a DP - 1990 Jan 01 TA - Thorax PG - 78--78 VI - 45 IP - 1 4099 - http://thorax.bmj.com/content/45/1/78.2.short 4100 - http://thorax.bmj.com/content/45/1/78.2.full SO - Thorax1990 Jan 01; 45