TY - JOUR T1 - Clinical chest radiology JF - Thorax JO - Thorax SP - 323 LP - 323 DO - 10.1136/thx.48.4.323 VL - 48 IS - 4 AU - Ian H Kerr Y1 - 1993/04/01 UR - http://thorax.bmj.com/content/48/4/323.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -