From the Chicago Tribune:

A study to see whether there's a link between PCBs and breast cancer is part of a Wayne State University scientist's work that has received $775,000 in federal stimulus funding.

Melissa Runge-Morris, acting director of the Detroit school's Institute of Environmental Health Sciences, heads a study of the potential role of polychlorinated biphenyls in the progression of breast cancer. A $418,000 grant from the National Institutes of Health supports the work.

PCBs were banned in 1979 but once were widely used in industry. They tend to accumulate in the body fat of those who consume them.