PT - JOURNAL ARTICLE AU - Ian H Kerr TI - Clinical chest radiology AID - 10.1136/thx.48.4.323 DP - 1993 Apr 01 TA - Thorax PG - 323--323 VI - 48 IP - 4 4099 - http://thorax.bmj.com/content/48/4/323.short 4100 - http://thorax.bmj.com/content/48/4/323.full SO - Thorax1993 Apr 01; 48