Prevalence of airflow limitation among employees in Norwegian smelters: a longitudinal study
Vidar Søyseth, Helle Laier Johnsen, Merete Drevvatne Bugge, Siri Merete Hetland, Johny Kongerud
Occupational and Environmental Medicine Jan 2011, 68 (1) 24-29; DOI: 10.1136/oem.2009.049452