A Mixed Bag

Using genetic testing before prescribing blood thinners has shown mixed results, NPR's Shots blog says. The blood thinner Plavix does carry a warning saying that people whose genes show they are a slow metabolizer of the drug may not get a benefit from taking it, but doctors aren't sure if they should test patients and, if they do, they don't know what to do if a patient is a slow metabolizer.

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Senator Elizabeth Warren (D-Mass.) has released the results of a genetic ancestry analysis, the Boston Globe reports.

Retraction Watch's Ivan Oransky and Adam Marcus report that Harvard Medical School and Brigham and Women's Hospital have recommended that more than 30 papers from a former researcher be retracted.

Thomas Steitz, who won the 2009 chemistry Nobel Prize for his ribosome work, has died, the Washington Post reports.

In PLOS this week: mechanisms for genes implicated in coronary artery disease, rumen microbes and host genetics influence cow methane production, and more.