In fact, there seem to be so many of these, that it would appear impossible for a company the size of Wal-Mart to gain access to the market without following this practice.

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Federally funded scientists can also derive stem cells, after informed consent, from aborted fetuses, but this practice is not without controversy.

CNN: NIH publishes draft guidelines for stem cell research

"Even right now, without this law, we know that the practice on the streets is different, " she told CNN.

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