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Making Drugs Count

A new test could customize therapies--and boost profits

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John Rennie is a former editor in chief of Scientific American.

More by John Rennie
Scientific American Magazine Vol 271 Issue 4This article was originally published with the title “Making Drugs Count” in Scientific American Magazine Vol. 271 No. 4 (), p. 132
doi:10.1038/scientificamerican1094-132