TY - JOUR T1 - AUTHORS' REPLY JF - Thorax JO - Thorax SP - 908 LP - 908 DO - 10.1136/thx.45.11.908-a VL - 45 IS - 11 AU - F Ruiz-Palomo AU - L Fogue Y1 - 1990/11/01 UR - http://thorax.bmj.com/content/45/11/908.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -