RT Journal Article SR Electronic T1 Increase in asthma: a more toxic environment or a more susceptible population? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 171 OP 174 DO 10.1136/thx.49.2.171 VO 49 IS 2 A1 A Seaton A1 D J Godden A1 K Brown YR 1994 UL http://thorax.bmj.com/content/49/2/171.abstract AB