The CDC performed the study to help the Food and Drug Administration and the USDA, the two main government agencies responsible for regulating food safety, to focus their efforts on preventing food contamination, Dr. Griffin said.

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The test was performed with a box of camp waste (largely food rests) in a bin bag.

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The magnets they wanted to place inside Patrick weren't approved by the Food and Drug Administration as a medical device, and Scaife knew of no one who had performed the procedure.

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