Defining and investigating occupational asthma: a consensus approach
H C Francis, C O Prys-Picard, D Fishwick, C Stenton, P S Burge, L M Bradshaw, J G Ayres, S M Campbell, R McL Niven
Occupational and Environmental Medicine Jun 2007, 64 (6) 361-365; DOI: 10.1136/oem.2006.028902