TY - JOUR T1 - Immunology and Immunologic Diseases of the Lung JF - Thorax JO - Thorax SP - 313 LP - 313 DO - 10.1136/thx.44.4.313-a VL - 44 IS - 4 AU - APG Y1 - 1989/04/01 UR - http://thorax.bmj.com/content/44/4/313.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -