TY - JOUR T1 - Chronic respiratory diseases. JF - Journal of Epidemiology and Community Health JO - J Epidemiol Community Health SP - 4 LP - 5 DO - 10.1136/jech.47.1.4 VL - 47 IS - 1 AU - W W Holland Y1 - 1993/02/01 UR - http://jech.bmj.com/content/47/1/4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -