50a. Prevalence of abnormal chest x-ray, selected construction occupations at U.S. Department of Energy sites, 1996-2010. 50b. Prevalence of abnormal pulmonary function test, selected construction occupations at U.S. Department of Energy sites, 1996-2010.
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50d. Lung diseases among older construction workers in 10-year follow-up, construction trades vs. white-collar occupations, 1998 vs. 2008(All employment)