Editors from 23 journals have sent a letter to officials at seven Japanese universities that once employed anesthesiologist Yoshitaka Fujii to demand they validate some 193 papers he has written and published, reports Retraction Watch's Adam Marcus. The editors say that if the papers are not validated, they will be retracted en masse.

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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.