Researchers have identified the first genetic marker that predicts retroaction to hepatitis C treatments, and a single letter of DNA code appears to make a huge difference. Duke health center Medical Center scientists says the biomarker not only predicts who is most likely to respond to regimen and who isn't, but also may explain why there are such 1995 by houghton mifflin harcourt publishing company. published by houghton mifflin harcourt publishing company. all rights reserved.cite this source synonym collection v1.1copyright © 2008 by lexico publishing group rates of retroaction among racial and ethnic groups, a peculiarity that has puzzled physicians for years.

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