Personal exposure to nitrogen dioxide and risk of airflow obstruction in asthmatic children with upper respiratory infection
C H Linaker, D Coggon, S T Holgate, J Clough, L Josephs, A J Chauhan, H M Inskip
Thorax Nov 2000, 55 (11) 930-933; DOI: 10.1136/thorax.55.11.930