Public-Health-Data-study-design-The-association-between-job-related-exposure-to-welding-fumes-and-chronic-obstructive-pulmonary-disease-health-and-medicine-homework-help
Must be original work only The association between job-related exposure to welding fumes and chronic obstructive pulmonary disease (COPD) was explored in a case-control study. The following data were reported for 450 COPD patients: 40 patients were currently employed as welders; the other 410 had no occupational exposure to welding fumes. Among the 900 controls […]
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