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The Boston Globe

Business

US investigating J&J on implant marketing

TRENTON, N.J. — Federal prosecutors are investigating Johnson & Johnson’s practices in marketing a line of hip replacements recalled in 2010 because many had to be replaced within a few years — part of a string of more than 30 product recalls by the health care giant in the last 3½ years.

The US attorney’s office in Massachusetts and the Civil Division of the US Justice Department in August sent Johnson & Johnson an ‘‘informal request’’ for information about its ASR hip replacements, J&J reported in a regulatory filing Friday.

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