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Engineering and medicine to cease all actives on a study to determine whether people living in the coal mining sites are more prone to certain diseases like cancer. >> the evidence we have seen so far in over two dozen articles and studies have shown higher cancer rates, higher rates of heart and cardiovascular disease. >>. >> reporter: the agency said it put a hold on this study because of this changing budget situation. the study focussed on four states, west virginia, virginia, kentucky and t...

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